Doc: fix QRegularExpression::wildcardToRegularExpression snippet

The sample output from wildcardToRegularExpression was from an earlier
version of the implementation. This patch fixes this.

Change-Id: I48108add01aafed69490ef2527c1ea6a209b220b
Reviewed-by: Sze Howe Koh <szehowe.koh@gmail.com>

src/corelib/doc/snippets/code/src_corelib_tools_qregularexpression.cpp

@@ -353,7 +353,10 @@ while (i.hasNext()) {
 {
 //! [31]
 QString wildcard = QRegularExpression::wildcardToRegularExpression("*.jpeg");
-// wilcard == ".*\.jpeg"
+// Will match files with names like:
+//    foo.jpeg
+//    f_o_o.jpeg
+//    föö.jpeg
 //! [31]
 }