Update pnpm/action-setup action to v6

Author: renovate[bot]

action.yml

@@ -24,7 +24,7 @@ inputs:
 runs:
   using: composite
   steps:
-    - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4.2.0
+    - uses: pnpm/action-setup@903f9c1a6ebcba6cf41d87230be49611ac97822e # v6.0.3
 
     - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
       with: