build(deps): bump the slang-dependencies group with 3 updates

Bumps the slang-dependencies group with 3 updates: [slang](https://github.com/slang-i18n/slang), [slang_build_runner](https://github.com/slang-i18n/slang) and [slang_flutter](https://github.com/slang-i18n/slang).


Updates `slang` from 4.7.2 to 4.8.1
- [Release notes](https://github.com/slang-i18n/slang/releases)
- [Commits](https://github.com/slang-i18n/slang/commits)

Updates `slang_build_runner` from 4.7.0 to 4.8.1
- [Release notes](https://github.com/slang-i18n/slang/releases)
- [Commits](https://github.com/slang-i18n/slang/commits)

Updates `slang_flutter` from 4.7.0 to 4.8.0
- [Release notes](https://github.com/slang-i18n/slang/releases)
- [Commits](slang-i18n/slang@v4.7.0...v4.8.0)

---
updated-dependencies:
- dependency-name: slang
  dependency-version: 4.8.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: slang-dependencies
- dependency-name: slang_build_runner
  dependency-version: 4.8.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: slang-dependencies
- dependency-name: slang_flutter
  dependency-version: 4.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: slang-dependencies
...

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

Author: dependabot[bot]

packages/flutter_app/pubspec.yaml

@@ -47,7 +47,7 @@ dependencies:
   pub_dev_api_client: ^1.0.0
   shared_preferences: ^2.5.3
   simple_logger: ^1.9.0+1
-  slang: ^4.6.0
+  slang: ^4.8.1
   slang_flutter: ^4.3.0
   sort_key_generator: ^0.2.1
   themes: ^1.0.0

pubspec.lock

@@ -1646,26 +1646,26 @@ packages:
     dependency: transitive
     description:
       name: slang
-      sha256: "6668a08355b370d5cb5446fc869c4492ed23c6433934fe88228876460fedac22"
+      sha256: b02c531f453c328a1343818c64d730357ac140860147c9a29030fdfc82039266
       url: "https://pub.dev"
     source: hosted
-    version: "4.7.2"
+    version: "4.8.1"
   slang_build_runner:
     dependency: transitive
     description:
       name: slang_build_runner
-      sha256: dac0afb5a88ddd90e59d4c71ee228e078879cffbcbeca5fae2befef3c2896dd2
+      sha256: c1cf6525aee9afa9411d689908e6638f2da0ad581ce59eb11132d5f976450c8c
       url: "https://pub.dev"
     source: hosted
-    version: "4.7.0"
+    version: "4.8.1"
   slang_flutter:
     dependency: transitive
     description:
       name: slang_flutter
-      sha256: fff13b6fc8b0378ee23856c4f9fd7f8e2777b430090681f4d19ab14c47de9bc6
+      sha256: "7a5e55f2b1ec99e06354a5213b992d34017efacccba8ffc6066cfc5517cc0282"
       url: "https://pub.dev"
     source: hosted
-    version: "4.7.0"
+    version: "4.8.0"
   sort_key_generator:
     dependency: transitive
     description: