Bump xyz.rogfam:littleproxy from 2.0.20 to 2.0.21 (#277)

Bumps [xyz.rogfam:littleproxy](https://github.com/LittleProxy/LittleProxy) from 2.0.20 to 2.0.21.
- [Release notes](https://github.com/LittleProxy/LittleProxy/releases)
- [Changelog](https://github.com/LittleProxy/LittleProxy/blob/main/RELEASE_NOTES.md)
- [Commits](LittleProxy/LittleProxy@v2.0.20...v2.0.21)

---
updated-dependencies:
- dependency-name: xyz.rogfam:littleproxy
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -36,7 +36,7 @@ subprojects {
         jettyVersion = '9.4.51.v20230217'
         log4jVersion = '2.20.0'
         nettyVersion = '4.1.99.Final'
-        littleProxyVersion = '2.0.20'
+        littleProxyVersion = '2.0.21'
         slf4jVersion = '2.0.9'
         swaggerVersion = '2.2.16'
         guavaVersion = '32.1.2-jre'