Fix filters links.

Author: jcamiel

sites/hurl.dev/_data/docs.yml

@@ -290,6 +290,7 @@
             - title: split
             - title: toDate
             - title: toFloat
+            - title: toHex
             - title: toInt
             - title: toString
             - title: urlDecode

sites/hurl.dev/_docs/filters.md

@@ -484,4 +484,4 @@ bytes decode "gb2312" xpath "string(//body)" == "你好世界"
 [JSONPath]: https://goessner.net/articles/JsonPath/
 [Base64 encoded string]: https://datatracker.ietf.org/doc/html/rfc4648#section-4
 [Base64 URL safe encoding]: https://datatracker.ietf.org/doc/html/rfc4648#section-5
-[Encoding Standard]: https://encoding.spec.whatwg.org/]https://encoding.spec.whatwg.org/#concept-encoding-get
+[Encoding Standard]: https://encoding.spec.whatwg.org/#concept-encoding-get