CI: Upgrade Go CI, check go.mod

Author: earthboundkid

.github/workflows/go.yml

@@ -7,13 +7,14 @@ jobs:
     name: Build
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-go@v3
+    - uses: actions/checkout@v4
+    - uses: actions/setup-go@v5
       with:
-        go-version: '1.22'
-        cache: true
+        go-version: stable
     - name: Get dependencies
       run: go mod download
+    - name: Check go.mod
+      run: go mod tidy -diff
     - name: Test
       run: go test -race -v -coverprofile=profile.cov ./...
     - uses: shogo82148/actions-goveralls@v1