Bump pnpm/action-setup from 2 to 3 (#170)

Author: dependabot[bot]

.github/workflows/deploy-docs.yml

@@ -17,7 +17,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Install pnpm
-      uses: pnpm/action-setup@v2
+      uses: pnpm/action-setup@v3
       with:
         version: 8.x.x
 

.github/workflows/test-docs.yml

@@ -17,7 +17,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Install pnpm
-      uses: pnpm/action-setup@v2
+      uses: pnpm/action-setup@v3
       with:
         version: 8.x.x