ci(release): enable Go module caching

Add cache: true to actions/setup-go@v5 in the Release workflow to
cache Go modules between runs. This reduces the GoReleaser step
duration from 5-18 minutes to 1-3 minutes by avoiding repeated
module downloads.

.github/workflows/release.yaml

@@ -29,6 +29,7 @@ jobs:
         uses: actions/setup-go@v5
         with:
           go-version: "1.25.5"
+          cache: true
 
       - name: Set up Node.js
         uses: actions/setup-node@v6