Try skipping step instead of job for non-PRs

.github/workflows/subproject-changes.yml

@@ -12,31 +12,26 @@ permissions:
 
 on:
   workflow_call:
-    inputs:
-      event_name:
-        required: true
-        type: string
     outputs:
       czishrink:
         description: "true if the change affects czishrink or if event_name is not 'pull_request'; false otherwise"
-        value: ${{ inputs.event_name != 'pull_request' || jobs.changes.outputs.czishrink == 'true' }}
+        value: ${{ jobs.changes.outputs.czishrink }}
       czicompress:
         description: "true if the change affects czicompress or if event_name is not 'pull_request'; false otherwise"
-        value: ${{ inputs.event_name != 'pull_request' || jobs.changes.outputs.czishrink == 'true' }}
+        value: ${{ jobs.changes.outputs.czishrink }}
 
 jobs:
   # JOB to run change detection
   changes:
-    if: ${{ inputs.event_name == 'pull_request' }}
     runs-on: ubuntu-latest
     # Set job outputs to values from filter step
     outputs:
-      czishrink: ${{ steps.filter.outputs.czishrink }}
-      czicompress: ${{ steps.filter.outputs.czicompress }}
+      czishrink: ${{ github.event_name != 'pull_request' || steps.filter.outputs.czishrink == 'true' }}
+      czicompress: ${{ github.event_name != 'pull_request' || steps.filter.outputs.czicompress == 'true' }}
     steps:
-      - run: echo ${{ github.event_name }}
       # For pull requests it's not necessary to checkout the code
       - uses: dorny/paths-filter@v2
+        if: ${{ github.event_name == 'pull_request' }}
         id: filter
         with:
           filters: |