chore: disable npm caching in release workflow

Remove `cache: 'npm'` from all three jobs in the release workflow
(prepare-release, test-and-build, publish-npm) to ensure fresh
dependency installs during releases per security review.

Author: tejaskash

.github/workflows/release.yml

@@ -53,7 +53,6 @@ jobs:
         uses: actions/setup-node@v6
         with:
           node-version: 20.x
-          cache: 'npm'
 
       - name: Configure git
         run: |
@@ -218,7 +217,6 @@ jobs:
         uses: actions/setup-node@v6
         with:
           node-version: 20.x
-          cache: 'npm'
 
       - name: Install dependencies
         run: npm ci
@@ -307,7 +305,6 @@ jobs:
         uses: actions/setup-node@v6
         with:
           node-version: 22.x
-          cache: 'npm'
           registry-url: 'https://registry.npmjs.org'
 
       - name: Ensure npm 11.5.1+ for trusted publishing