Bump to a newer setup-go version

And add a separate build step on Linux, so we're more comparable with
Windows. The extra build step will take some time, but it will also make
the next build step faster due to caching.

.github/workflows/linux-ci.yml

@@ -13,7 +13,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version-file: "go.mod"
 
@@ -24,5 +24,6 @@ jobs:
       - name: Install golangci-lint
         run: curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b "$(go env GOPATH)"/bin v1.54.1
 
+      - run: go build
       - run: ./test.sh
       - run: GOARCH=386 ./test.sh

.github/workflows/windows-ci.yml

@@ -13,7 +13,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version-file: "go.mod"