build(deps): update core dependency to b01f9b4

- Update core dependency in pubspec.yaml and pubspec.lock
- Change ref from f409be2 to b01f9b4 in both files

Author: fulleni

pubspec.lock

@@ -185,8 +185,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: f409be2590785b4f35e260b0e15a65e5bdfe9ee0
-      resolved-ref: f409be2590785b4f35e260b0e15a65e5bdfe9ee0
+      ref: b01f9b457d4faaa6fab58f67ebc09d93314e6b10
+      resolved-ref: b01f9b457d4faaa6fab58f67ebc09d93314e6b10
       url: "https://github.com/flutter-news-app-full-source-code/core.git"
     source: git
     version: "1.3.1"

pubspec.yaml

@@ -145,7 +145,7 @@ dependency_overrides:
   core:
     git:
       url: https://github.com/flutter-news-app-full-source-code/core.git
-      ref: f409be2590785b4f35e260b0e15a65e5bdfe9ee0
+      ref: b01f9b457d4faaa6fab58f67ebc09d93314e6b10
   http_client:
     git:
       url: https://github.com/flutter-news-app-full-source-code/http-client.git