Update build instructions

Renamed the target for creating the conda environment to "create/conda" to align with naming conventions. Also provided an alternative command for creating the environment using mamba.

Signed-off-by: Jose Borreguero <[email protected]>

docs/developer/instruction/build.rst

@@ -139,7 +139,7 @@ After setting the environment variables, run the following ``make`` targets in t
 
 .. code-block:: shell
 
-   make conda/create
+   make create/conda # or "make create/mamba" for mamba, to create the webmon conda environment
    make all  # create: python packages for dasmon, webmon, and workflow; fake SNS data; self-signed SSL certificates
    make localdev/up  # build all the services