Fix regex filter docs (#79736)

* Fix notes in regex_replace doc

The documentation says that this maps to 'regex.replace' when it should say 're.replace'. The distinction is important because of the third-party 'regex' module that has more features than the built-in 're' module. https://pypi.org/project/regex/

* Fix notes in re.search docs

The documentation says that this maps to 'regex.search' when it should say 're.search'. The distinction is important because of the third-party 'regex' module that has more features than the built-in 're' module. https://pypi.org/project/regex/

lib/ansible/plugins/filter/regex_replace.yml

@@ -5,7 +5,7 @@ DOCUMENTATION:
   description:
     - Replace a substring defined by a regular expression with another defined by another regular expression based on the first match.
   notes:
-    - Maps to Python's C(regex.replace).
+    - Maps to Python's C(re.replace).
   positional: _input, _regex_match, _regex_replace
   options:
     _input:

lib/ansible/plugins/filter/regex_search.yml

@@ -5,7 +5,7 @@ DOCUMENTATION:
   description:
     - Search in a string to extract the part that matches the regular expression.
   notes:
-    - Maps to Python's C(regex.search).
+    - Maps to Python's C(re.search).
   positional: _input, _regex
   options:
     _input: