fix spdxVersion for bsi and oct

[viveksahu26]

closes #349

This PR fixes parsing of SPDX Version correctly for bsi and oct compliance. Whereas no changes in score.

For bsi:

go run main.go compliance --bsi   samples/photon.spdx.json 
BSI TR-03183-2 v1.1 Compliance Report 
Compliance score by Interlynk Score:2.5 RequiredScore:5.0 OptionalScore:0.0 for samples/photon.spdx.json
* indicates optional fields
+-------------------------------------+---------+--------------------------------+------------------------------------------------------------------+-------+
|              ELEMENTID              | SECTION |           DATAFIELD            |                          ELEMENT RESULT                          | SCORE |
+-------------------------------------+---------+--------------------------------+------------------------------------------------------------------+-------+
| SBOM                                |       4 | specification                  | spdx                                                             |  10.0 |
+                                     +---------+--------------------------------+------------------------------------------------------------------+-------+
|                                     |       4 | specification version          | SPDX-2.2                                                         |  10.0 |
+                                     +---------+--------------------------------+------------------------------------------------------------------+-------+

For oct:

go run main.go compliance --oct   samples/photon.spdx.json 
OpenChain Telco Report
Compliance score by Interlynk Score:2.9 RequiredScore:2.9 OptionalScore:0.0 for samples/photon.spdx.json
* indicates optional fields
+-------------------------------------+---------+------------------------------+------------------------------------------------------------------+-------+
|              ELEMENTID              | SECTION |          DATAFIELD           |                          ELEMENT RESULT                          | SCORE |
+-------------------------------------+---------+------------------------------+------------------------------------------------------------------+-------+
| SPDX Elements                       | 3.1.1   | SBOM data format             | spdx                                                             |  10.0 |
+                                     +---------+------------------------------+------------------------------------------------------------------+-------+
|                                     | 3.1.10  | SBOM creator tool            | tern                                                             |  10.0 |
+                                     +---------+------------------------------+------------------------------------------------------------------+-------+
|                                     | 3.1.11  | SBOM machine readable format | spdx, json                                                       |  10.0 |
+                                     +---------+------------------------------+------------------------------------------------------------------+-------+
|                                     | 3.1.12  | SBOM human readable format   | json                                                             |  10.0 |
+                                     +---------+------------------------------+------------------------------------------------------------------+-------+
|                                     | 3.1.14  | SBOM delivery time           | unknown                                                          |   0.0 |
+                                     +---------+------------------------------+------------------------------------------------------------------+-------+
|                                     | 3.1.15  | SBOM delivery method         | unknown                                                          |   0.0 |
+                                     +---------+------------------------------+------------------------------------------------------------------+-------+
|                                     | 3.1.16  | SBOM scope                   | unknown                                                          |   0.0 |
+                                     +---------+------------------------------+------------------------------------------------------------------+-------+
|                                     | 3.1.2   | Spec version                 | SPDX-2.2                                                         |  10.0 |
+                                     +---------+------------------------------+------------------------------------------------------------------+-------+

[riteshnoronha]

This is incorrect for BSI 1.1 its SPDX-2.3 only.

[viveksahu26]

addressed it !!