[clang] [clang-format] Fix bad comment indentation before ifdef after braceless if (PR #94776)

[Owen Pan via cfe-commits]

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@@ -338,6 +338,9 @@ class UnwrappedLineParser {
   // `decltype(auto)`.
   bool IsDecltypeAutoFunction = false;
 
+  // Current nesting depth within unbraced codeblocks.
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owenca wrote:

```suggestion
  // Nesting depth of unbraced body of a control statement.
```

https://github.com/llvm/llvm-project/pull/94776