Avoid getting changed files for releases (#6381)

The changed files GitHub Action is not available for release events, so
we skip that step and directly set the output to false for releases.
This restores how releases worked before #6374.

Author: agners

.github/workflows/builder.yml

@@ -72,12 +72,16 @@ jobs:
 
       - name: Get changed files
         id: changed_files
+        if: github.event_name != 'release'
         uses: masesgroup/retrieve-changed-files@491e80760c0e28d36ca6240a27b1ccb8e1402c13 # v3.0.0
 
       - name: Check if requirements files changed
         id: requirements
         run: |
-          if [[ "${{ steps.changed_files.outputs.all }}" =~ (requirements\.txt|build\.yaml|\.github/workflows/builder\.yml) ]]; then
+          # No wheels build necessary for releases
+          if [[ "${{ github.event_name }}" == "release" ]]; then
+            echo "changed=false" >> "$GITHUB_OUTPUT"
+          elif [[ "${{ steps.changed_files.outputs.all }}" =~ (requirements\.txt|build\.yaml|\.github/workflows/builder\.yml) ]]; then
             echo "changed=true" >> "$GITHUB_OUTPUT"
           fi