Pin MediatR to <13.x

# Conflicts:
#	src/Kattbot/Kattbot.csproj

Author: selfdocumentingcode

src/Kattbot/Kattbot.csproj

@@ -24,10 +24,10 @@
         <PackageReference Include="DSharpPlus" Version="5.0.0-nightly-02538" />
         <PackageReference Include="DSharpPlus.CommandsNext" Version="5.0.0-nightly-02538" />
         <PackageReference Include="DSharpPlus.Interactivity" Version="5.0.0-nightly-02538" />
-        <PackageReference Include="MediatR" Version="13.0.0" />
-        <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.9" />
-        <PackageReference Include="Microsoft.Extensions.Hosting.Systemd" Version="9.0.9" />
-        <PackageReference Include="Microsoft.Extensions.Http" Version="9.0.9" />
+        <PackageReference Include="MediatR" Version="[12.5.0, 13)" />
+        <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.8" />
+        <PackageReference Include="Microsoft.Extensions.Hosting.Systemd" Version="9.0.8" />
+        <PackageReference Include="Microsoft.Extensions.Http" Version="9.0.8" />
         <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.4" />
         <PackageReference Include="SixLabors.ImageSharp" Version="3.1.11" />
         <PackageReference Include="SixLabors.ImageSharp.Drawing" Version="2.1.7" />