chore(deps): update actions/setup-go action to v4

Author: renovate[bot]

.github/workflows/go.yml

@@ -13,7 +13,7 @@ jobs:
     - uses: actions/checkout@v2
 
     - name: Set up Go
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v4
       with:
         go-version: 1.15
 

.github/workflows/release.yml

@@ -13,7 +13,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Set up Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
           go-version: 1.15
       - name: Run GoReleaser