chore(deps): update actions/setup-go action to v6.4.0

Author: renovate[bot]

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@v6.0.2
         with:
           fetch-depth: 2
-      - uses: actions/setup-go@v6.3.0
+      - uses: actions/setup-go@v6.4.0
         with:
           go-version: '1.26'
       - name: Run coverage

.github/workflows/go.yml

@@ -17,7 +17,7 @@ jobs:
     - uses: actions/checkout@v6.0.2
 
     - name: Set up Go
-      uses: actions/setup-go@v6.3.0
+      uses: actions/setup-go@v6.4.0
       with:
         go-version: '1.26'