fix: use GITOPS_REPO_URL secret for git clone

.woodpecker.yml

@@ -26,11 +26,14 @@ steps:
 
   - name: update-gitops
     image: alpine/git:latest
+    environment:
+      GITOPS_REPO_URL:
+        from_secret: GITOPS_REPO_URL
     commands:
       - |
         set -e
         echo "Updating GitOps for nxtgauge-admin-solid"
-        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
         ADMIN_OVERLAY="apps/nxtgauge-admin-solid/overlays/prod"