CI: bump golangci version

.github/workflows/tests.yml

@@ -254,7 +254,7 @@ jobs:
         uses: golangci/golangci-lint-action@v6
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
-          version: v1.63.4
+          version: v1.64.8
           args: --verbose --timeout 5m
 
         # only run golangci-lint for pull requests, otherwise ALL hints get