chore(pubspec): update layrz_theme version to 7.5.28

Author: ManuelRomeroA

example/pubspec.lock

@@ -390,7 +390,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "7.5.27"
+    version: "7.5.28"
   leak_tracker:
     dependency: transitive
     description: