fix(deps): update dependency com.squareup.okhttp3:okhttp to v5 (#719)

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>

Author: elastic-renovate-prod[bot]

gradle/libs.versions.toml

@@ -57,7 +57,7 @@ mockserver-client = "org.mock-server:mockserver-client-java:5.15.0"
 
 junitBom = { group = "org.junit", name = "junit-bom", version.ref = "junit" }
 
-okhttp = "com.squareup.okhttp3:okhttp:4.12.0"
+okhttp = "com.squareup.okhttp3:okhttp:5.0.0"
 
 hdrhistogram = "org.hdrhistogram:HdrHistogram:2.2.2"
 lmax-disruptor = "com.lmax:disruptor:3.4.4"