v8: update to latest stable release 15.5.35.13

Depends on https://github.com/lightpanda-io/zig-v8-fork/pull/215 and
https://github.com/lightpanda-io/pkg/pull/3

.github/actions/install/action.yml

@@ -17,7 +17,7 @@ inputs:
   v8:
     description: 'v8 version to install'
     required: false
-    default: '14.9.207.35'
+    default: '15.5.35.13'
   cache-dir:
     description: 'cache dir to use'
     required: false