add github pages publish step

Author: simonnorris1

.github/workflows/performance-e2e.yaml

@@ -159,3 +159,11 @@ jobs:
           name: jmeter-nurse-journey-output-${{ env.timestamp }}
           path: nurse-output
           if-no-files-found: warn
+
+      - name: Publish test report
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_branch: gitpage-trial
+          publish_dir: jmeter=report
+