[Docs] Correct examples for * and + in regexp-syntax.asciidoc (#53210)

Author: AdamCanady

docs/reference/query-dsl/regexp-syntax.asciidoc

@@ -75,7 +75,7 @@ abc?     # matches 'ab' and 'abc'
 Repeat the preceding character one or more times. For example:
 
 ....
-ab+     # matches 'abb', 'abbb', 'abbbb', etc.
+ab+     # matches 'ab', 'abb', 'abbb', etc.
 ....
 --
 
@@ -85,7 +85,7 @@ ab+     # matches 'abb', 'abbb', 'abbbb', etc.
 Repeat the preceding character zero or more times. For example:
 
 ....
-ab*     # matches 'ab', 'abb', 'abbb', 'abbbb', etc.
+ab*     # matches 'a', 'ab', 'abb', 'abbb', etc.
 ....
 --
 
@@ -221,4 +221,4 @@ You can combine the `@` operator with `&` and `~` operators to create an
 === Unsupported operators
 Lucene's regular expression engine does not support anchor operators, such as
 `^` (beginning of line) or `$` (end of line). To match a term, the regular
-expression must match the entire string.
+expression must match the entire string.