fix: update CI workflow to build from cmd/reverseproxy and use Go 1.25 only

Author: janmbaco

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go-version: ['1.24', '1.25']
+        go-version: ['1.25']
     steps:
       - name: Checkout code
         uses: actions/checkout@v5