Specify pnpm version in 1 place (package.json)

Author: mikemaccana

.github/workflows/anchor.yml

@@ -107,8 +107,6 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - uses: pnpm/action-setup@v4
-        with:
-          version: 10
       - uses: heyAyushh/setup-anchor@v4.999
         with:
           anchor-version: 0.32.1

.github/workflows/solana-native.yml

@@ -191,7 +191,6 @@ jobs:
           # Make the script executable
           chmod +x build_and_test.sh
 
-          # pnpm is already installed via pnpm/action-setup
       - name: Setup Solana Stable
         uses: heyAyushh/setup-solana@v5.9
         with:

.github/workflows/solana-pinocchio.yml

@@ -191,7 +191,6 @@ jobs:
           # Make the script executable
           chmod +x build_and_test.sh
 
-          # pnpm is already installed via pnpm/action-setup
       - name: Setup Solana Stable
         uses: heyAyushh/setup-solana@v5.9
         with: