ci: simplify configuration and improve CI flexibility

- Remove specific version specification from GitHub Actions workflow
- Remove `exportloopref` linter from `.golangci.yml` configuration

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

Author: appleboy

.github/workflows/go.yml

@@ -33,7 +33,6 @@ jobs:
       - name: Setup golangci-lint
         uses: golangci/golangci-lint-action@v6
         with:
-          version: v1.60.1
           args: --verbose
 
       - name: Bearer

.golangci.yml

@@ -7,7 +7,6 @@ linters:
     - dogsled
     - dupl
     - errcheck
-    - exportloopref
     - exhaustive
     - gochecknoinits
     - goconst