Bump the nservicebuscore group across 1 directory with 3 updates

Bumps the nservicebuscore group with 3 updates in the /src directory: [NServiceBus.AcceptanceTests.Sources](https://github.com/Particular/NServiceBus), NUnit and [NServiceBus.PersistenceTests.Sources](https://github.com/Particular/NServiceBus).


Updates `NServiceBus.AcceptanceTests.Sources` from 8.1.1 to 9.1.1
- [Release notes](https://github.com/Particular/NServiceBus/releases)
- [Commits](Particular/NServiceBus@8.1.1...9.1.1)

Updates `NUnit` from 3.13.3 to 3.14.0

Updates `NServiceBus.PersistenceTests.Sources` from 8.1.6 to 9.1.1
- [Release notes](https://github.com/Particular/NServiceBus/releases)
- [Commits](Particular/NServiceBus@8.1.6...9.1.1)

Updates `NUnit` from 3.13.3 to 3.14.0

---
updated-dependencies:
- dependency-name: NServiceBus.AcceptanceTests.Sources
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nservicebuscore
- dependency-name: NUnit
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: nservicebuscore
- dependency-name: NServiceBus.PersistenceTests.Sources
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nservicebuscore
- dependency-name: NUnit
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: nservicebuscore
...

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

src/AcceptanceTests/AcceptanceTests.csproj

@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="NServiceBus.AcceptanceTests.Sources" Version="8.1.1" GeneratePathProperty="true" />
+    <PackageReference Include="NServiceBus.AcceptanceTests.Sources" Version="9.1.1" GeneratePathProperty="true" />
     <PackageReference Include="GitHubActionsTestLogger" Version="2.4.1" />
   </ItemGroup>
 

src/PersistenceTests/PersistenceTests.csproj

@@ -21,7 +21,7 @@
     <PackageReference Include="Microsoft.ServiceFabric.Data" Version="6.1.1390" />
     <!-- DO NOT REMOVE Newtonsoft.Json, it is added so that dependabot knows about version changes-->
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageReference Include="NServiceBus.PersistenceTests.Sources" Version="8.1.6" />
+    <PackageReference Include="NServiceBus.PersistenceTests.Sources" Version="9.1.1" />
     <PackageReference Include="GitHubActionsTestLogger" Version="2.4.1" />
   </ItemGroup>