chore(deps): update dependency diffengine to 15.8.0

Author: renovate[bot]

src/Akavache.Tests/Akavache.Tests.csproj

@@ -23,7 +23,7 @@
     <PackageReference Include="System.Net.Http" Version="4.3.4" />
     <PackageReference Include="SQLitePCLRaw.bundle_e_sqlite3" Version="2.1.10" />
     <PackageReference Include="FluentAssertions" Version="7.0.0" />
-    <PackageReference Include="DiffEngine" Version="15.6.0" />
+    <PackageReference Include="DiffEngine" Version="15.8.0" />
     <PackageReference Include="PublicApiGenerator" Version="11.3.0" />
     <PackageReference Include="Verify.Xunit" Version="28.8.1" />
     <PackageReference Include="coverlet.msbuild" Version="6.0.3">