use pkgxdev/setup@v3

Strictly should require a major version bump but v1 is 8 days old so the number of users affected should be minimal.

Author: mxcl

action.yml

@@ -9,7 +9,7 @@ inputs:
 runs:
   using: composite
   steps:
-    - uses: pkgxdev/setup@v2
+    - uses: pkgxdev/setup@v3
 
     - run: |
         TMP="$(mktemp)"