Update pnpm/action-setup action to v4

Author: renovate[bot]

.github/workflows/desktop-pr-build.yml

@@ -33,7 +33,7 @@ jobs:
           node-version: 22
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v2
+        uses: pnpm/action-setup@v4
         with:
           version: 9
 
@@ -105,7 +105,7 @@ jobs:
           node-version: 22
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v2
+        uses: pnpm/action-setup@v4
         with:
           version: 9
 

.github/workflows/release-desktop-beta.yml

@@ -29,7 +29,7 @@ jobs:
           node-version: 22
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v2
+        uses: pnpm/action-setup@v4
         with:
           version: 9
 
@@ -96,7 +96,7 @@ jobs:
           node-version: 22
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v2
+        uses: pnpm/action-setup@v4
         with:
           version: 9