add corepack enable to install pnpm in workflows

Author: sksat

.github/workflows/pytest.yml

@@ -54,6 +54,10 @@ jobs:
         cache: pnpm
         cache-dependency-path: examples/${{ matrix.c2a_user }}/pnpm-lock.yaml
 
+    - name: setup pnpm
+      run: |
+        corepack enable pnpm
+
     - name: Cache C2A devtools
       id: cache-c2a-devtools
       uses: actions/cache@v4.0.2

.github/workflows/validate-renovate.yml

@@ -14,6 +14,10 @@ jobs:
       - uses: actions/checkout@v4.1.7
       - uses: actions/setup-node@v4.0.2
 
+      - name: setup pnpm
+        run: |
+          corepack enable pnpm
+
       - name: install
         run: |
           pnpm install -g renovate