chore(ci): update ArangoDB image version from 3.10.9 to 3.11 for impr…

…oved features and security

The ArangoDB image version is updated to the latest stable release,
which may include important bug fixes, performance improvements, and new
features that enhance the CI workflow's reliability and security.

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       arangodb:
-        image: arangodb:3.10.9
+        image: arangodb:3.11
         env:
           ARANGO_ROOT_PASSWORD: rootpass
         ports:
@@ -28,7 +28,6 @@ jobs:
           ARANGO_PASS: rootpass
           ARANGO_HOST: localhost
           ARANGO_PORT: ${{ job.services.arangodb.ports[8529] }}
-          GOPROXY: https://proxy.golang.org
       - name: upload coverage to codecov
         uses: codecov/codecov-action@v4
         with: