Revert "Ignore HttpComponents Javadoc"

This reverts commit f50b472.

HttpComponents Javadoc is available again.

See gh-29479
See https://issues.apache.org/jira/browse/HTTPCLIENT-2227

Author: sbrannen

build.gradle

@@ -117,7 +117,7 @@ configure([rootProject] + javaProjects) { project ->
 			"https://fasterxml.github.io/jackson-core/javadoc/2.10/",
 			"https://fasterxml.github.io/jackson-databind/javadoc/2.10/",
 			"https://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.10/",
-			//"https://hc.apache.org/httpcomponents-client-5.2.x/current/httpclient5/apidocs/",
+			"https://hc.apache.org/httpcomponents-client-5.2.x/current/httpclient5/apidocs/",
 			"https://projectreactor.io/docs/test/release/api/",
 			"https://junit.org/junit4/javadoc/4.13.2/",
 			// TODO Uncomment link to JUnit 5 docs once we have sorted out