ci: Improve check_docs skipping (#33455)

Peter Tripp created 

Follow-up to: https://github.com/zed-industries/zed/pull/33398

Logic there was incomplete. Caused [this
failure](https://github.com/zed-industries/zed/actions/runs/15904169712/job/44854558276).

Release Notes:

- N/A

Change summary

.github/workflows/ci.yml | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

Detailed changes

.github/workflows/ci.yml 🔗 

@@ -460,8 +460,10 @@ jobs:
           RET_CODE=0
           # Always check style
           [[ "${{ needs.style.result }}"      != 'success' ]] && { RET_CODE=1; echo "style tests failed"; }
-          [[ "${{ needs.check_docs.result }}" != 'success' ]] && { RET_CODE=1; echo "docs checks failed"; }
 
+          if [[ "${{ needs.job_spec.outputs.run_docs }}" == "true" ]]; then
+            [[ "${{ needs.check_docs.result }}" != 'success' ]] && { RET_CODE=1; echo "docs checks failed"; }
+          fi
           # Only check test jobs if they were supposed to run
           if [[ "${{ needs.job_spec.outputs.run_tests }}" == "true" ]]; then
             [[ "${{ needs.workspace_hack.result }}"       != 'success' ]] && { RET_CODE=1; echo "Workspace Hack failed"; }