[clang-tools-extra] [llvm] [clang-tidy][NFC] Fix formatting issue in `clang-tidy` documentations (PR #168722)

[Baranov Victor via llvm-commits]

================
@@ -28,7 +28,8 @@ Configuration
   - Diagnostic: list of diagnostics to be reported.
     - BindName: name of the node to be bound in `Query`.
     - Message: message to be reported.
-    - Level: severity of the diagnostic, the possible values are `Note`, `Warning`.
+    - Level: severity of the diagnostic, the possible values are `Note`,
----------------
vbvictor wrote:

```suggestion
    - Level: severity of the diagnostic, the possible values are
    `Note`, `Warning`.
```

https://github.com/llvm/llvm-project/pull/168722