ci: drop pnpm version pin so publish reads packageManager

pnpm/action-setup@v4 errors with "Multiple versions of pnpm specified"
when both `version:` and package.json `packageManager` are set. The npm
and binary publish workflows check out this repo (packageManager at root),
so the explicit `version: 10` collided and both 5.0.0-beta.0 publish jobs
failed. Remove the pin and let the action read pnpm@10.17.1 from
package.json. cli-ci.yml keeps its pin: it checks out the dcd monorepo
where there's no root packageManager to read.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: riglar

.github/workflows/npm-publish.yml

@@ -29,7 +29,6 @@ jobs:
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: 10
           run_install: false
 
       - uses: actions/setup-node@v5

.github/workflows/release-binaries.yml

@@ -29,7 +29,6 @@ jobs:
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: 10
           run_install: false
 
       - uses: actions/setup-node@v5