Update CI workflow

Signed-off-by: Tomoki Sugiura <[email protected]>

.github/workflows/ci.yaml

@@ -4,15 +4,26 @@ on:
   push:
     branches:
     - 'main'
-env:
-  go-version: "1.22"
+
 jobs:
   test:
+    strategy:
+      matrix:
+        go-version: [ 1.22 ]
+        platform: [ ubuntu-22.04 ]
     name: Small tests
-    runs-on: ubuntu-22.04
+    runs-on: ${{ matrix.platform }}
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-go@v5
       with:
-        go-version: ${{ env.go-version }}
+        go-version: ${{ matrix.go-version }}
+    - uses: actions/cache@v4
+      with:
+        path: |
+          ~/.cache/go-build
+          ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go-
     - run: make test