fix: use of regular expressions

docs/platforms/flutter/configuration/filtering.mdx

@@ -69,7 +69,7 @@ When a string or a non-error object is raised, Sentry creates a synthetic except
 
 Based on the URL, you can narrow down whether events should be sent to Sentry.
 Using `allowUrls`, events are only sent if the URL matches the pattern specified in `allowUrls`.
-`allowUrls` also accepts regular expression by adding the `^` and the `$` to the string.
+`allowUrls` uses regular expression to compare.
 
 If used on a platform other than Web, this setting will be ignored.
 
@@ -79,7 +79,7 @@ If used on a platform other than Web, this setting will be ignored.
 
 You can exclude events sent to Sentry based on the URL.
 Using `denyUrls`, events are ignored if the URL matches the pattern specified in `denyUrls`.
-`denyUrls` also accepts regular expression by adding the `^` and the `$` to the string.
+`denyUrls` uses regular expression to compare.
 
 In combination with `allowUrls` you can block subdomains of the domains listed in `allowUrls`.