ci: let package.json own the pnpm pin - action-setup rejects a second pin (first real run: RED at Setup pnpm)

.gitea/workflows/ci.yml

@@ -41,6 +41,9 @@ on:
 env:
   # Pin Node + pnpm versions for reproducibility.
   NODE_VERSION: "20"
+  # Display label for the pnpm step only. The INSTALLED pnpm version is the
+  # packageManager pin in package.json - pnpm/action-setup rejects a second
+  # pin (workflow version: + package.json packageManager:) and exits 1.
   PNPM_VERSION: "11"
 
 jobs:
@@ -61,7 +64,6 @@ jobs:
       - name: Setup pnpm ${{ env.PNPM_VERSION }}
         uses: pnpm/action-setup@v4
         with:
-          version: ${{ env.PNPM_VERSION }}
           run_install: false
 
       - name: Get pnpm store dir
@@ -169,7 +171,6 @@ jobs:
       - name: Setup pnpm ${{ env.PNPM_VERSION }}
         uses: pnpm/action-setup@v4
         with:
-          version: ${{ env.PNPM_VERSION }}
           run_install: false
 
       - name: Cache pnpm store