Fix process into documentation to include garbage collectors

See gh-45631

Author: philwebb

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/info/InfoEndpointDocumentationTests.java

@@ -110,7 +110,12 @@ private ResponseFieldsSnippet processInfo() {
 				fieldWithPath("memory.nonHeap.used").description("The number of bytes currently being used."),
 				fieldWithPath("memory.nonHeap.committed").description("The number of bytes committed for JVM use."),
 				fieldWithPath("memory.nonHeap.max")
-					.description("The maximum number of bytes that can be used by the JVM (or -1)."));
+					.description("The maximum number of bytes that can be used by the JVM (or -1)."),
+				fieldWithPath("memory.garbageCollectors").description("Details for garbage collectors."),
+				fieldWithPath("memory.garbageCollectors[].name").description("Name of of the garbage collector."),
+				fieldWithPath("memory.garbageCollectors[].collectionCount")
+					.description("Total number of collections that have occurred."));
+
 	}
 
 	private ResponseFieldsSnippet javaInfo() {