[clang-tools-extra] [clang-tidy] Fix false positive for generic lambda parameters in readability-non-const-parameter (PR #179051)

[via cfe-commits]

================
@@ -216,7 +216,8 @@ Changes in existing checks
 
 - Improved :doc:`readability-non-const-parameter
   <clang-tidy/checks/readability/non-const-parameter>` check by avoiding false
-  positives on parameters used in dependent expressions.
+  positives for pointer parameters in generic lambdas (C++20 lambdas with
----------------
zeyi2 wrote:

nit: `in dependent expressions (e.g. inside generic lambdas).` WDYT?

rationale: we introduced these lines

```c++
    if (T->isDependentType())
      markCanNotBeConst(VD->getInit(), false);
```

that are meant to support `DependentType`

https://github.com/llvm/llvm-project/pull/179051