SOLR-17315: Fix message formatting

[epugh]

https://issues.apache.org/jira/browse/SOLR-17315

Description

Fix the issue that when you create a collection, the post create message gives some example commands that are not formatted properly.

Solution

Use the correct parameter for getting the name of the collection, remove the -p parameter that is no longer used.

Tests

manual

Checklist

Please review the following and check all that apply:

• I have reviewed the guidelines for How to Contribute and my code conforms to the standards described there to the best of my ability.
• I have created a Jira issue and added the issue ID to my pull request title.
• I have given Solr maintainers access to contribute to my PR branch. (optional but recommended)
• I have developed this patch against the main branch.
• I have run ./gradlew check.
• I have added tests for my changes.
• I have added documentation for the Reference Guide