Update actions/setup-go action to v6 (#350)

* Update actions/setup-go action to v6

* Specify go-version-file

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Atsushi Watanabe <atsushi.w@ieee.org>

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -14,7 +14,9 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v7
       - name: Setup Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
+        with:
+          go-version-file: go.mod
       - name: Run go vet
         run: go vet ./...
       - name: Run go build

.github/workflows/release-test.yaml

@@ -14,7 +14,9 @@ jobs:
         with:
           fetch-depth: 0
       - name: Setup Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
+        with:
+          go-version-file: go.mod
       - name: Install GoReleaser
         uses: goreleaser/goreleaser-action@v7
         with:

.github/workflows/release.yaml

@@ -13,7 +13,9 @@ jobs:
         with:
           fetch-depth: 0
       - name: Setup Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
+        with:
+          go-version-file: go.mod
       - name: Install GoReleaser
         uses: goreleaser/goreleaser-action@v7
         with: