ci(gha): use pnpm/action-setup with package_json_file to honor pinned pnpm version

Author: charliecreates[bot]

.github/workflows/release.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: latest
+          package_json_file: package.json
           run_install: false
       - name: Setup Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4
@@ -65,7 +65,7 @@ jobs:
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: latest
+          package_json_file: package.json
           run_install: false
       - name: Setup Node.js 24
         uses: actions/setup-node@v4
@@ -103,7 +103,7 @@ jobs:
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: latest
+          package_json_file: package.json
           run_install: false
       - name: Setup Node.js 24 (with npm registry)
         uses: actions/setup-node@v4