Bump the ktsu group with 1 update

Bumps ktsu.AppDataStorage from 1.15.6 to 1.15.8

---
updated-dependencies:
- dependency-name: ktsu.AppDataStorage
  dependency-version: 1.15.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: ktsu
...

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

Author: dependabot[bot]

ProjectDirector/ProjectDirector.csproj

@@ -3,7 +3,7 @@
 <Project Sdk="ktsu.Sdk.App/1.8.0">
   <ItemGroup>
     <PackageReference Include="DiffPlex" Version="1.8.0" />
-    <PackageReference Include="ktsu.AppDataStorage" Version="1.15.6" />
+    <PackageReference Include="ktsu.AppDataStorage" Version="1.15.8" />
     <PackageReference Include="ktsu.Extensions" Version="1.5.7" />
     <PackageReference Include="ktsu.ImGuiApp" Version="2.1.7" />
     <PackageReference Include="ktsu.ImGuiPopups" Version="1.3.5" />