chore(deps): update pnpm/action-setup action to v6

Author: renovate[bot]

.github/workflows/CI.yml

@@ -23,7 +23,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
-      - uses: pnpm/action-setup@v5
+      - uses: pnpm/action-setup@v6
 
       - name: Setup node
         uses: actions/setup-node@v6
@@ -56,7 +56,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
-      - uses: pnpm/action-setup@v5
+      - uses: pnpm/action-setup@v6
 
       - name: Setup node
         uses: actions/setup-node@v6