ci: ekf change check only commit if files updated

.github/workflows/ekf_update_change_indicator.yml

@@ -25,16 +25,21 @@ jobs:
           make tests TESTFILTER=EKF
 
     - name: Check if there exists diff and save result in variable
-      run: echo "CHANGE_INDICATED=$(git diff --exit-code --output=/dev/null || echo $?)" >> $GITHUB_ENV
+      id: diff-check
+      run: echo "CHANGE_INDICATED=$(git diff --exit-code --output=/dev/null || echo $?)" >> $GITHUB_OUTPUT
       working-directory: src/modules/ekf2/test/change_indication
 
     - name: auto-commit any changes to change indication
       uses: stefanzweifel/git-auto-commit-action@v4
       with:
-        commit_message: '[AUTO COMMIT] update change indication'
+        file_pattern: 'src/modules/ekf2/test/change_indication/*.csv'
         commit_user_name: ${GIT_COMMITTER_NAME}
         commit_user_email: ${GIT_COMMITTER_EMAIL}
+        commit_message: |
+          '[AUTO COMMIT] update change indication'
+
+          See .github/workflopws/ekf_update_change_indicator.yml for more details
 
     - name: if there is a functional change, fail check
-      if: ${{ env.CHANGE_INDICATED }}
+      if: ${{ steps.diff-check.outputs.CHANGE_INDICATED }}
       run: exit 1