chore(deps): update dependency pnpm to v9.15.9

Author: renovate-bot

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: pnpm/action-setup@v4
         with:
-          version: 9.0.6
+          version: 9.15.9
       - uses: actions/setup-node@v4
         with:
           node-version: 22

.github/workflows/discord-activity-starter.yml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: pnpm/action-setup@v4
         with:
-          version: 9.0.6
+          version: 9.15.9
       - uses: actions/setup-node@v4
         with:
           node-version: 22

.github/workflows/nested-messages.yml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: pnpm/action-setup@v4
         with:
-          version: 9.0.6
+          version: 9.15.9
       - uses: actions/setup-node@v4
         with:
           node-version: 22

.github/workflows/sdk-playground.yml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: pnpm/action-setup@v4
         with:
-          version: 9.0.6
+          version: 9.15.9
       - uses: actions/setup-node@v4
         with:
           node-version: 22