fix: don't require GSSA run on docs only changes (#477)

### Description

GSSA incorrectly required on PRs with docs only changes.

### Checklist

- [ ] `README.md` has been updated or is not required
- [ ] push trigger tests
- [ ] manual release test
- [ ] automated releases test
- [ ] pull request trigger tests
- [ ] schedule trigger tests
- [ ] workflow errors/warnings reviewed and addressed

### Testing done 
splunk/splunk-add-on-for-okta-identity-cloud#420

Author: mkolasinski-splunk

.github/workflows/reusable-build-test-release.yml

@@ -2936,7 +2936,7 @@ jobs:
         run: |
           # GS Scorecard: must have run for PRs to main (result doesn't matter, but skipped = blocked)
           GS_RESULT=$(echo "$NEEDS" | jq -r '.["run-gs-scorecard"].result')
-          if [[ "${{ github.event_name }}" == "pull_request" ]] && [[ "${{ github.base_ref }}" == "main" ]] && [[ "$GS_RESULT" == "skipped" ]]; then
+          if [[ "${{ github.event_name }}" == "pull_request" ]] && [[ "${{ github.base_ref }}" == "main" ]] && [[ "$GS_RESULT" == "skipped" ]] && [[ "${{ needs.check-docs-changes.outputs.docs-only }}" != "true" ]]; then
             echo "::error::GS Scorecard is required for merging PRs to main. To unblock merging please add the 'execute_gs_scorecard' label and re-run the workflow."
             echo "## GS Scorecard Required" >> "$GITHUB_STEP_SUMMARY"
             echo "Add the \`execute_gs_scorecard\` label to this PR and re-run the workflow. GS Scorecard must complete before merging to main (result does not need to pass)." >> "$GITHUB_STEP_SUMMARY"