ci: don't add files to the workspace

Author: rjaegers

.github/workflows/update-dependencies.yml

@@ -79,7 +79,7 @@ jobs:
             echo "> Before merging this PR, please conduct a manual test checking basic functionality of the updated plug-ins. There are limited automated tests for the VS Code Extension updates."
             echo ""
             cat "$MARKDOWN_SUMMARY_FILE"
-          } >> pull-request-body.md
+          } >> "${RUNNER_TEMP}/pull-request-body.md"
         env:
           MARKDOWN_SUMMARY_FILE: ${{ steps.update-extensions.outputs.markdown-summary-file }}
       - uses: actions/create-github-app-token@29824e69f54612133e76f7eaac726eef6c875baf # v2.2.1
@@ -93,7 +93,7 @@ jobs:
         with:
           commit-message: "Update ${{ join(fromJson(steps.update-extensions.outputs.updated-dependencies), ', ') }} in ${{ matrix.file }}"
           branch: feature/amp-devcontainer-${{ matrix.flavor }}/update-vscode-extensions-${{ matrix.file }}
-          body-path: pull-request-body.md
+          body-path: "${RUNNER_TEMP}/pull-request-body.md"
           title: "chore(deps, ${{ matrix.flavor }}): update ${{ join(fromJson(steps.update-extensions.outputs.updated-dependencies), ', ') }} in ${{ matrix.file }}"
           labels: dependencies,vscode-extensions
           token: ${{ steps.token.outputs.token }}