chore(deps): Bump source_gen in /packages/app_intents_codegen

Bumps [source_gen](https://github.com/dart-lang/source_gen) from 4.2.0 to 4.2.3.
- [Release notes](https://github.com/dart-lang/source_gen/releases)
- [Commits](dart-lang/source_gen@source_gen-v4.2.0...source_gen-v4.2.3)

---
updated-dependencies:
- dependency-name: source_gen
  dependency-version: 4.2.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

packages/app_intents_codegen/pubspec.lock

@@ -20,9 +20,10 @@ packages:
   app_intents_annotations:
     dependency: "direct main"
     description:
-      path: "../app_intents_annotations"
-      relative: true
-    source: path
+      name: app_intents_annotations
+      sha256: eb3e589a429d88ad44f896431ade396d6c5d012dcad4675121d6e221af326b6d
+      url: "https://pub.dev"
+    source: hosted
     version: "0.10.0"
   args:
     dependency: "direct main"
@@ -380,10 +381,10 @@ packages:
     dependency: "direct main"
     description:
       name: source_gen
-      sha256: "1d562a3c1f713904ebbed50d2760217fd8a51ca170ac4b05b0db490699dbac17"
+      sha256: ec37cc0e6694374cbef59ed79685572c870a54ede6fa30a3e420feb3adffea02
       url: "https://pub.dev"
     source: hosted
-    version: "4.2.0"
+    version: "4.2.3"
   source_map_stack_trace:
     dependency: transitive
     description: