actions: show how secrets & outputs work with workflow_call (#934)

Reviewed-on: https://code.forgejo.org/forgejo/end-to-end/pulls/934
Co-authored-by: Earl Warren <contact@earl-warren.org>
Co-committed-by: Earl Warren <contact@earl-warren.org>

actions/example-workflow-call/.forgejo/workflows/test.yml

@@ -9,3 +9,15 @@ jobs:
     uses: ./.forgejo/workflows/reusable.yml
     with:
       parameter1: value1
+    secrets:
+      secret: keep_it_private
+
+  verify:
+    needs: [caller]
+    runs-on: docker
+    container:
+      image: code.forgejo.org/oci/node:22-bookworm
+    steps:
+      - run: |
+          set -x
+          test "${{ needs.caller.outputs.output1 }}" = "outputvalue1"