Remove registry-url from setup-node to avoid conflicting with OIDC

registry-url causes setup-node to write an .npmrc referencing
NODE_AUTH_TOKEN, which conflicts with OIDC's tokenless flow.
We only need setup-node for the npm version upgrade.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: theoephraim

.github/workflows/release.yaml

@@ -18,7 +18,6 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: lts/*
-          registry-url: 'https://registry.npmjs.org'
       - run: bun install
       # Build first since we use the local workspace package instead of the published one
       - run: bun run --filter @varlock/bumpy build

README.md

@@ -119,7 +119,6 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: lts/*
-          registry-url: 'https://registry.npmjs.org'
       - run: bun install
       - run: bunx @varlock/bumpy ci release
         env:

llms.md

@@ -607,7 +607,6 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: lts/*
-          registry-url: 'https://registry.npmjs.org'
       - run: bun install
       - run: bunx @varlock/bumpy ci release
         env: