refactor: improve Docker image pull string construction in Gitea CI workflow using jq arguments

.gitea/workflows/cicd.yml

@@ -38,10 +38,7 @@ jobs:
     name: Build & Push Docker Image
     needs: lint
     if: github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')
-    runs-on: gitea-runner-on-dsm
-    permissions:
-      packages: write
-      contents: read
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -106,9 +103,8 @@ jobs:
             
             # Check if Docker Image section already exists
             if [[ "$OLD_BODY" != *"## 🐳 Docker Image"* ]]; then
-              NEW_BODY="${OLD_BODY}\n\n## 🐳 Docker Image\n\`\`\`bash\ndocker pull ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${TAG_NAME}\n\`\`\`"
-              
-              jq -n --arg body "$NEW_BODY" '{body: $body}' | \
+              jq -n --arg old "$OLD_BODY" --arg img "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${TAG_NAME}" \
+                '{body: ($old + "\n\n## 🐳 Docker Image\n```bash\ndocker pull " + $img + "\n```")}' | \
               curl -s -X PATCH \
                 -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
                 -H "Content-Type: application/json" \