Bump fl_chart from 0.68.0 to 0.69.0 in /experimental/pedometer/example

Bumps [fl_chart](https://github.com/imaNNeo/fl_chart) from 0.68.0 to 0.69.0.
- [Release notes](https://github.com/imaNNeo/fl_chart/releases)
- [Changelog](https://github.com/imaNNeo/fl_chart/blob/main/CHANGELOG.md)
- [Commits](imaNNeo/fl_chart@0.68.0...0.69.0)

---
updated-dependencies:
- dependency-name: fl_chart
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

experimental/pedometer/example/pubspec.yaml

@@ -42,7 +42,7 @@ dependencies:
   ffi: ^2.1.2
   intl: ^0.19.0
   jni: ^0.10.1
-  fl_chart: ^0.68.0
+  fl_chart: ^0.69.0
 
 dev_dependencies:
   flutter_test: