[clang] [AST] Fix nested name specifiers printing as NamespaceNamespace (PR #65266)

[via cfe-commits]

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@@ -16,6 +16,7 @@
 #include "clang/AST/DeclOpenMP.h"
 #include "clang/AST/DeclTemplate.h"
 #include "clang/AST/LocInfoType.h"
+#include "clang/AST/NestedNameSpecifier.h"
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cor3ntin wrote:

That does not seem necessary

https://github.com/llvm/llvm-project/pull/65266