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

Author: renovate[bot]

.github/workflows/wc-update-ecs-manifest.yml

@@ -43,7 +43,7 @@ jobs:
         run: echo "UNIXTIME=$(date +'+%s')" >> "$GITHUB_ENV"
 
       - name: Install Go
-        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+        uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
 
       - name: Install jsonnet
         run: |