Consistent punctuation in list (review feedback)

Co-authored-by: Ralf Handl <[email protected]>

Author: handrews

versions/3.0.4.md

@@ -2080,7 +2080,7 @@ Keys and values for `parameters` have multiple syntaxes:
 Certain keys and values for `parameters` can be ambiguous, in which case their handling is implementation-defined as it was not spelled out in earlier versions of OAS 3.0.  However, it is RECOMMENDED that: 
 
 * Keys that match unqualified parameter names be treated as those names, as a parameter that is (confusingly) named to appear qualified (e.g. `path.id`) can be qualified to disambiguate it (e.g. `path.path.id`).
-* Values that are valid runtime expressions be handled as runtime expressions, although this means that it is not possible to pass a literal value that looks like a runtime expression
+* Values that are valid runtime expressions be handled as runtime expressions, although this means that it is not possible to pass a literal value that looks like a runtime expression.
 
 ##### Examples