Bump MediatR from 12.2.0 to 12.3.0 (#120)

Bumps [MediatR](https://github.com/jbogard/MediatR) from 12.2.0 to 12.3.0.
- [Release notes](https://github.com/jbogard/MediatR/releases)
- [Commits](jbogard/MediatR@v12.2.0...v12.3.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/Company.Orion.Domain.Core/Company.Orion.Domain.Core.csproj

@@ -9,7 +9,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="MediatR" Version="12.2.0" />
+    <PackageReference Include="MediatR" Version="12.3.0" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="7.6.0" />
   </ItemGroup>