Bump PinballApi to 3.2.8

Picks up the unrated-tournament deserialization fix (nullable computed
metrics) and the GetPlayers single-endpoint workaround — fixing the
calendar detail page and the About-page sponsors load.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: edgiardina

IfpaMaui.csproj

@@ -99,7 +99,7 @@
         <PackageReference Include="Serilog.Sinks.File" Version="7.0.0" />
         <PackageReference Include="The49.Maui.BottomSheet" Version="8.0.3" />
 
-        <PackageReference Include="PinballApi" Version="3.2.7" />
+        <PackageReference Include="PinballApi" Version="3.2.8" />
     </ItemGroup>
 
     <PropertyGroup>