Gitignore GHA creds file; update PR workflow step

Author: ciarams87

.github/workflows/nfr.yml

@@ -164,6 +164,8 @@ jobs:
         branch: tests/nfr-tests-${{ inputs.version }}
         delete-branch: true
         title: NFR Test Results for NGF version ${{ inputs.version }}
+        add-paths: |
+          tests/results/
         body: |
           Update with NFR test results for NGF version ${{ inputs.version }}
           - Auto-generated by the NFR tests workflow run ${{ github.run_id }}

.gitignore

@@ -48,3 +48,6 @@ internal/mode/static/nginx/modules/coverage
 
 # Dotenv files
 **/*.env
+
+# Credential files
+**/gha-creds-*.json