Update escaped chars list for domain modifier

docs/general/ad-filtering/create-own-filters.md

@@ -384,7 +384,7 @@ entry_i = ( regular_domain / any_tld_domain / regexp )
 
 - **`regular_domain`** — a regular domain name (`domain.com`). Corresponds the specified domain and its subdomains. It is matched lexicographically.
 - **`any_tld_domain`** — a domain name ending with a wildcard character as a [public suffix](https://publicsuffix.org/learn/), e.g. for `example.*` it is `co.uk` in `example.co.uk`. Corresponds to the specified domain and its subdomains with any public suffix. It is matched lexicographically.
-- **`regexp`** — a regular expression, starts and ends with `/`. The pattern works the same way as in the basic URL rules, but the characters `/`, `$`, and `|` must be escaped with `\`.
+- **`regexp`** — a regular expression, starts and ends with `/`. The pattern works the same way as in the basic URL rules, but the characters `/`, `$`, `,`, and `|` must be escaped with `\`.
 
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