Add caching of go installs

Author: cloudshiftchris

.github/workflows/tests.yml

@@ -14,6 +14,9 @@ jobs:
           - "1.19"
 
     steps:
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v3
+
       - name: Set up Go ${{ matrix.go }}
         uses: actions/setup-go@v3
         with:
@@ -23,9 +26,6 @@ jobs:
 
       - run: go version
 
-      - name: Check out code into the Go module directory
-        uses: actions/checkout@v3
-
       - name: go test
         run: go test -v -race -coverprofile=coverage.txt -covermode=atomic ./...