Apply suggestions from code review

Co-authored-by: Liam Newman <bitwiseman@gmail.com>

Author: yrodiere

src/main/java/org/kohsuke/github/GHRequestedAction.java

@@ -42,7 +42,7 @@ public String getIdentifier() {
      *
      * @return the label
      */
-    public String getLabel() {
+    String getLabel() {
         return label;
     }
 
@@ -51,7 +51,7 @@ public String getLabel() {
      *
      * @return the description
      */
-    public String getDescription() {
+    String getDescription() {
         return description;
     }