ci: use zig-v8 0.1.9

Author: krichprollsch

.github/actions/install/action.yml

@@ -17,7 +17,7 @@ inputs:
   zig-v8:
     description: 'zig v8 version to install'
     required: false
-    default: 'v0.1.8'
+    default: 'v0.1.9'
   v8:
     description: 'v8 version to install'
     required: false