Bump System.Runtime.CompilerServices.Unsafe from 5.0.0 to 6.0.0

Bumps [System.Runtime.CompilerServices.Unsafe](https://github.com/dotnet/runtime) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v5.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: System.Runtime.CompilerServices.Unsafe
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/Akka.Persistence.Redis.Cluster.Tests/Akka.Persistence.Redis.Cluster.Tests.csproj

@@ -24,7 +24,7 @@
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(TestSdkVersion)" />
         <!-- Needed by Redis to run -->
-        <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="5.0.0" />
+        <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="6.0.0" />
         <PackageReference Include="Docker.DotNet" Version="$(DockerVersion)" />
         <PackageReference Include="xunit" Version="$(XunitVersion)" />
         <PackageReference Include="xunit.runner.visualstudio" Version="$(XunitVersion)">

src/Akka.Persistence.Redis.Tests/Akka.Persistence.Redis.Tests.csproj

@@ -24,7 +24,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(TestSdkVersion)" />
     <!-- Needed by Redis to run -->
-    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="5.0.0" />
+    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="6.0.0" />
     <PackageReference Include="Docker.DotNet" Version="$(DockerVersion)" />
     <PackageReference Include="xunit" Version="$(XunitVersion)" />
     <PackageReference Include="xunit.runner.visualstudio" Version="$(XunitVersion)">

src/benchmarks/Akka.Persistence.Redis.Benchmark.DockerTests/Akka.Persistence.Redis.Benchmark.DockerTests.csproj

@@ -14,7 +14,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(TestSdkVersion)" />
     <PackageReference Include="Docker.DotNet" Version="$(DockerVersion)" />
     <!-- Needed by Redis to run -->
-    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="5.0.0" />
+    <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="6.0.0" />
     <PackageReference Include="Akka" Version="$(AkkaVersion)" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="JetBrains.dotMemoryUnit" Version="3.1.20200127.214830" />