Moved release note addition to a new LLVM_21 section.

Author: epistax

clang/tools/libclang/libclang.map

@@ -431,14 +431,18 @@ LLVM_19 {
 
 LLVM_20 {
   global:
-    clang_getFullyQualifiedName;
     clang_getOffsetOfBase;
     clang_getTypePrettyPrinted;
     clang_isBeforeInTranslationUnit;
     clang_visitCXXBaseClasses;
     clang_visitCXXMethods;
 };
 
+LLVM_21 {
+  global:
+    clang_getFullyQualifiedName;
+};
+
 # Example of how to add a new symbol version entry.  If you do add a new symbol
 # version, please update the example to depend on the version you added.
 # LLVM_X {