fix: upgrade io.projectreactor:reactor-core from 3.4.24 to 3.5.2 (#1932)

Snyk has created this PR to upgrade io.projectreactor:reactor-core from 3.4.24 to 3.5.2.

See this package in Maven Repository:
https://mvnrepository.com/artifact/io.projectreactor/reactor-core/

See this project in Snyk:
https://app.snyk.io/org/openfeign/project/4431a6a8-1e77-4c40-95be-04fdef0e4526?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: Marvin Froeder <velo@users.noreply.github.com>