[llvm-branch-commits] [clang-tools-extra] [clang-tidy][docs] Rewrite short check docs to Markdown (PR #210467)

[Zeyi Xu via llvm-branch-commits]

================
@@ -1,11 +1,11 @@
-.. title:: clang-tidy - cert-msc30-c
+```{title} clang-tidy - cert-msc30-c
+```
 
-cert-msc30-c
-============
+# cert-msc30-c
 
 The `cert-msc30-c` check is an alias, please see
-:doc:`misc-predictable-rand <../misc/predictable-rand>` for more information.
+{doc}`misc-predictable-rand <../misc/predictable-rand>` for more information.
 
 This check corresponds to the CERT C Coding Standard rule
-`MSC30-C. Do not use the rand() function for generating pseudorandom numbers
-<https://cmu-sei.github.io/secure-coding-standards/sei-cert-c-coding-standard/rules/miscellaneous-msc/msc30-c/>`_.
+[MSC30-C. Do not use the rand() function for generating pseudorandom numbers](https://cmu-sei.github.io/secure-coding-standards/sei-cert-c-coding-standard/rules/miscellaneous-msc/msc30-c/).
+
----------------
zeyi2 wrote:

```suggestion
```

https://github.com/llvm/llvm-project/pull/210467