Bump Immediate.Handlers from 3.4.0 to 3.6.0

---
updated-dependencies:
- dependency-name: Immediate.Handlers
  dependency-version: 3.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

benchmarks/Foundatio.Mediator.Benchmarks/Foundatio.Mediator.Benchmarks.csproj

@@ -32,7 +32,7 @@
 
   <ItemGroup>
     <PackageReference Include="BenchmarkDotNet" Version="0.15.8" />
-    <PackageReference Include="Immediate.Handlers" Version="3.4.0" />
+    <PackageReference Include="Immediate.Handlers" Version="3.6.0" />
     <PackageReference Include="MassTransit" Version="9.0.1" />
     <PackageReference Include="MediatR" Version="14.1.0" />
     <PackageReference Include="RhoMicro.BdnLogging" Version="1.0.3" />