Bump io.github.openfeign:feign-gson from 13.3 to 13.4

Bumps [io.github.openfeign:feign-gson](https://github.com/openfeign/feign) from 13.3 to 13.4.
- [Release notes](https://github.com/openfeign/feign/releases)
- [Changelog](https://github.com/OpenFeign/feign/blob/master/CHANGELOG.md)
- [Commits](OpenFeign/feign@13.3...13.4)

---
updated-dependencies:
- dependency-name: io.github.openfeign:feign-gson
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

build.gradle

@@ -55,7 +55,7 @@ subprojects {
         commonsTextVersion = "1.12.0"
         dropwizardWebsocketsVersion = "1.3.14"
         equalsVerifierVersion = "3.16.2"
-        feignVersion = "13.3"
+        feignVersion = "13.4"
         gsonVersion = "2.11.0"
         guavaVersion = "33.3.0-jre"
         hamcrestOptionalVersion = "2.0.0"