[clang] [clang] fix matching of nested template template parameters (PR #130447)

[via cfe-commits]

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@@ -602,6 +602,11 @@ namespace regression3 {
   template <class...> class B {};
   template struct A<B, Node<None>>;
 } // namespace regression3
+namespace regression4 {
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cor3ntin wrote:

```suggestion
namespace GH130362 {
```

https://github.com/llvm/llvm-project/pull/130447