[CI] backport: show event information for debug purposes

It will help figure out why two runs of testing happen when a backport
PR is open.

Refs: https://codeberg.org/forgejo/forgejo/pulls/2922
Refs: https://codeberg.org/forgejo/forgejo/issues/2009

.forgejo/workflows/backport.yml

@@ -40,6 +40,11 @@ jobs:
     container:
       image: 'docker.io/node:20-bookworm'
     steps:
+      - name: event info
+        run: |
+          cat <<'EOF'
+          ${{ toJSON(github) }}
+          EOF
       - name: Fetch labels
         id: fetch-labels
         shell: bash

.forgejo/workflows/testing.yml

@@ -14,6 +14,11 @@ jobs:
     container:
       image: 'docker.io/node:20-bookworm'
     steps:
+      - name: event info
+        run: |
+          cat <<'EOF'
+          ${{ toJSON(github) }}
+          EOF
       - uses: https://code.forgejo.org/actions/checkout@v3
       - uses: https://code.forgejo.org/actions/setup-go@v4
         with: