ci: Update deploy key for nightly and release archives

Author: gate-guardian

.github/workflows/nightly.yml

@@ -66,7 +66,7 @@ jobs:
       - name: Deploy nightly archive
         uses: peaceiris/actions-gh-pages@v4
         with:
-          deploy_key: ${{ secrets.MANIFEST_DEPLOY_KEY }}
+          deploy_key: ${{ secrets.ARCHIVE_DEPLOY_KEY }}
           external_repository: ${{ env.ARCHIVE_REPO }}
           publish_branch: ${{ env.ARCHIVE_BRANCH }}
           publish_dir: archive

.github/workflows/release.yml

@@ -67,7 +67,7 @@ jobs:
       - name: Deploy release archive
         uses: peaceiris/actions-gh-pages@v4
         with:
-          deploy_key: ${{ secrets.MANIFEST_DEPLOY_KEY }}
+          deploy_key: ${{ secrets.ARCHIVE_DEPLOY_KEY }}
           external_repository: ${{ env.ARCHIVE_REPO }}
           publish_branch: ${{ env.ARCHIVE_BRANCH }}
           publish_dir: archive