docs: adding comment to new class

src/main/java/org/eclipsefoundation/git/eca/api/models/GithubPullRequestComment.java

@@ -14,6 +14,9 @@ import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
 import com.google.auto.value.AutoValue;
 
+/**
+ * Model response for repos/{org}/{repo}/pulls/{pullNumber}/comments
+ */
 @AutoValue
 @JsonDeserialize(builder = AutoValue_GithubPullRequestComment.Builder.class)
 public abstract class GithubPullRequestComment {