ci: remove npm install -g npm@latest from publish workflow

Node 22.22.2 bundled npm is incompatible with npm@latest global install
due to missing promise-retry module. The bundled npm is sufficient.

Author: libraz

.github/workflows/publish.yml

@@ -21,7 +21,6 @@ jobs:
           node-version: '22'
           registry-url: 'https://registry.npmjs.org'
 
-      - run: npm install -g npm@latest
       - run: corepack enable
       - run: corepack prepare yarn@4.12.0 --activate