👷 (repo): Fix auto update tools workflow

.github/workflows/update_toolchain.yml

@@ -33,9 +33,26 @@ jobs:
 
       - name: Set new versions
         if: steps.changes.outputs.status > 0
+        id: new-versions
         run: |
           proto use
           pnpm i
+          echo "version=$(pnpm -v)" >> $GITHUB_OUTPUT
+
+      - name: Update package.json
+        if: steps.changes.outputs.status > 0
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const fs = require('fs');
+            const packageJson = fs.readFileSync('./package.json', 'utf8');
+            const json = JSON.parse(packageJson);
+            const packageManager = json.packageManager;
+            const newVersion = `pnpm@${{ steps.new-versions.outputs.version }}`;
+            if (packageManager !== newVersion) {
+              json.packageManager = newVersion;
+              fs.writeFileSync('./package.json', JSON.stringify(json, null, 2));
+            }
 
       - name: Health check
         if: steps.changes.outputs.status > 0
@@ -51,6 +68,7 @@ jobs:
         if: steps.changes.outputs.status > 0 && success()
         run: |
           git add .prototools
+          git add package.json
           git commit -m "🔧 (repo) [NO-ISSUE]: Update toolchain"
           git push origin ${{ env.BRANCH_NAME }}
           gh pr create \