Bump Hangfire.AspNetCore, Hangfire.NetCore and Hangfire.Core

Bumps [Hangfire.AspNetCore](https://github.com/HangfireIO/Hangfire), [Hangfire.NetCore](https://github.com/HangfireIO/Hangfire) and [Hangfire.Core](https://github.com/HangfireIO/Hangfire). These dependencies needed to be updated together.

Updates `Hangfire.AspNetCore` from 1.8.6 to 1.8.7
- [Release notes](https://github.com/HangfireIO/Hangfire/releases)
- [Commits](HangfireIO/Hangfire@v1.8.6...v1.8.7)

Updates `Hangfire.NetCore` from 1.8.6 to 1.8.7
- [Release notes](https://github.com/HangfireIO/Hangfire/releases)
- [Commits](HangfireIO/Hangfire@v1.8.6...v1.8.7)

Updates `Hangfire.Core` from 1.8.6 to 1.8.7
- [Release notes](https://github.com/HangfireIO/Hangfire/releases)
- [Commits](HangfireIO/Hangfire@v1.8.6...v1.8.7)

---
updated-dependencies:
- dependency-name: Hangfire.AspNetCore
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Hangfire.NetCore
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Hangfire.Core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

TeachingRecordSystem/Directory.Packages.props

@@ -19,9 +19,9 @@
     <PackageVersion Include="FluentValidation.AspNetCore" Version="11.3.0" />
     <PackageVersion Include="GovukNotify" Version="6.1.0" />
     <PackageVersion Include="GovUk.Frontend.AspNetCore" Version="1.4.0" />
-    <PackageVersion Include="Hangfire.AspNetCore" Version="1.8.6" />
-    <PackageVersion Include="Hangfire.Core" Version="1.8.6" />
-    <PackageVersion Include="Hangfire.NetCore" Version="1.8.6" />
+    <PackageVersion Include="Hangfire.AspNetCore" Version="1.8.7" />
+    <PackageVersion Include="Hangfire.Core" Version="1.8.7" />
+    <PackageVersion Include="Hangfire.NetCore" Version="1.8.7" />
     <PackageVersion Include="Hangfire.PostgreSql" Version="1.20.4" />
     <PackageVersion Include="Humanizer.Core" Version="2.14.1" />
     <PackageVersion Include="IdentityModel" Version="6.2.0" />