Fix release workflow permissions

Add explicit `contents: write` permission to fix "Resource not accessible
by integration" error when uploading release assets.

Also update deprecated action versions:
- actions/checkout@v3 -> v4
- actions/setup-go@v3 -> v5
- bruceadams/get-release@v1.2.3 -> v1.3.2

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: benbjohnson

.github/workflows/release.yml

@@ -4,6 +4,10 @@ on:
       - created
 
 name: Release
+
+permissions:
+  contents: write
+
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -26,13 +30,13 @@ jobs:
       GOARCH: ${{ matrix.arch }}
 
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-go@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
         with:
           go-version: '1.24'
 
       - id: release
-        uses: bruceadams/get-release@v1.2.3
+        uses: bruceadams/get-release@v1.3.2
         env:
           GITHUB_TOKEN: ${{ github.token }}