Setting the form boundary for restsharp#1716

Fixed missing resource in JSON overloads

Avoid changing the serializer root element per request

Use client encoding as fallback (restsharp#1693)

Merge branch 'more-tests' into dev

Cleaning up parameters (restsharp#1683)

Bump FluentAssertions from 5.10.3 to 6.3.0 (restsharp#1680)

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 5.10.3 to 6.3.0.
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Changelog](https://github.com/fluentassertions/fluentassertions/blob/master/AcceptApiChanges.ps1)
- [Commits](fluentassertions/fluentassertions@5.10.3...6.3.0)

---
updated-dependencies:
- dependency-name: FluentAssertions
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

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

Update releasenotes.md

Change the nuget job

Fixing more tests