Fix comparison of invalidation counts (#30)

Author: mateuszbaran

.github/workflows/Invalidations.yml

@@ -36,5 +36,7 @@ jobs:
         echo "Invalidations on default branch: ${{ steps.invs_default.outputs.total }} (${{ steps.invs_default.outputs.deps }} via deps)" >> $GITHUB_STEP_SUMMARY
         echo "This branch: ${{ steps.invs_pr.outputs.total }} (${{ steps.invs_pr.outputs.deps }} via deps)" >> $GITHUB_STEP_SUMMARY
     - name: Check if the PR does increase number of invalidations
-      if: steps.invs_pr.outputs.total > steps.invs_default.outputs.total
-      run: exit 1
+      run: |
+        if [ ${{ steps.invs_pr.outputs.total }} -gt ${{ steps.invs_default.outputs.total }} ]; then
+          exit 1
+        fi