upgrade go 1.18 to 1.21

Author: GIC-de

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.18
+        go-version: 1.21
 
     - name: Build
       run: go build -v ./...

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.18
+        go-version: 1.21
 
     - name: GoReleaser Action
       uses: goreleaser/goreleaser-action@v2.9.1