fix: use GITOPS_REPO_URL secret for git clone

.woodpecker.yml

@@ -54,11 +54,14 @@ steps:
 
   - name: update-gitops
     image: alpine/git:latest
+    environment:
+      GITOPS_REPO_URL:
+        from_secret: GITOPS_REPO_URL
     commands:
       - |
         set -e
         echo "Updating GitOps for ${SERVICE}"
-        git clone https://x-access-token:${GITHUB_TOKEN}@github.com/Traceworks2023/nxtgauge-gitops.git /tmp/gitops
+        git clone ${GITOPS_REPO_URL} /tmp/gitops
         cd /tmp/gitops
         git checkout main
         BACKEND_OVERLAY="apps/nxtgauge-backend-rust/overlays/prod"