[clang-tools-extra] [clang-tidy][NFC][doc] improve "options" sections of `bugprone-` and `modernize-` checks (PR #133525)

[Baranov Victor via cfe-commits]

================
@@ -163,7 +163,11 @@ Options
     Semicolon-separated list of containers without their template parameters
     and some ``emplace``-like method of the container. Example:
     ``vector::emplace_back``. Those methods will be checked for improper use and
-    the check will report when a temporary is unnecessarily created.
+    the check will report when a temporary is unnecessarily created. Default
----------------
vbvictor wrote:

Done

https://github.com/llvm/llvm-project/pull/133525