ci: disable go cache for self-hosted runner

Apparently self-hosted runners don't require the go caching, and for
some reason it can take 20 minutes.

This sets `cache: false` for actions/setup-go@v4

.github/workflows/ci.yaml

@@ -41,6 +41,7 @@ jobs:
         with:
           go-version: '1.21.x'
           check-latest: true
+          cache: false
 
       - name: Install dependencies
         env: