build: Update to latest action versions.

This updates to the following Github Actions:

- actions/checkout@08c6903 # v5.0.0
- actions/setup-go@4469467 # v6.0.0

Author: davecgh

.github/workflows/go.yml

@@ -8,12 +8,12 @@ jobs:
       matrix:
         go: ["1.19", "1.20"]
     steps:
+      - name: Check out source
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Set up Go
-        uses: actions/setup-go@4d34df0c2316fe8122ab82dc22947d607c0c91f9 #v4.0.0
+        uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
         with:
           go-version: ${{ matrix.go }}
-      - name: Check out source
-        uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # 3.5.2
       - name: Install Linters
         run: "curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.52.2"
       - name: Test