fix: Don't publish comments when no files is update

[benjaminParisel]

Skip the Comments step when no file updates are detected.

Closes #534

• [x] :warning: Before Merge this PR, we need to remove the cherry-picked commit

[github-actions[bot]]

:recycle: PR Preview 7355a4e5610ad25e7ad53a56f2711773e526ea18 has been successfully destroyed since this PR has been closed.

_{🤖 By surge-preview}

[github-actions[bot]]

:recycle: PR Preview 7355a4e5610ad25e7ad53a56f2711773e526ea18 has been successfully destroyed since this PR has been closed.

_{🤖 By surge-preview}

[benjaminParisel]

I cherry-picked the commit from the #673 Pull request to test the preview workflow. In #673, we see a useless comment with some undefined/undefined links.

With the fix in this PR, this link is not adding for this PR.

[tbouffard]

Put in draft until we remove the cherry-pick commit to validate the fix. Once merged, this will be tested in #673

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[tbouffard]

I am merging this PR and validate the change in the master branch by updating https://github.com/bonitasoft/bonita-labs-doc/pull/152 ✔️ Tests OK: https://github.com/bonitasoft/bonita-labs-doc/pull/152#issuecomment-1972995194