fix(docs): corrected URL

Author: mfranzke

docs/research/tabs.md

@@ -19,7 +19,7 @@
 | [Telefonica Mistica](https://github.com/Telefonica/mistica-web)                         |               [tabs](https://brandfactory.telefonica.com/d/iSp7b1DkYygv/n-a#/components/tabs)                | `div`, `button role=tab`, no panels                                                                                                                            |
 | [Telekom Scale](https://github.com/telekom/scale)                                       |      [tab-navigation](https://telekom.github.io/scale/?path=/docs/components-tab-navigation--text-icon)      | `div role=tablist`, `span role=tab`, `div role="tabpanel"`                                                                                                     |
 | [Washington Post Design System](https://build.washingtonpost.com/)                      |                           [tabs](https://build.washingtonpost.com/components/tabs)                           | `div role=tablist`, `button role=tab`, `div`, alignement, disabled, overflow, !activationMode!                                                                 |
-| [W3C](https://www.w3.org/WAI/ARIA/apg/patterns/)                                        |                            [tabs pattern](https://w3.org/WAI/https://w3.org/WAI/)                            | Tabs -> Tablist = set of tab-elements (serves as label for tabpanel) -> activation displays content of tabpanel; aria and role attributes accurately described |
+| [W3C](https://www.w3.org/WAI/ARIA/apg/patterns/)                                        |                        [tabs pattern](https://www.w3.org/WAI/ARIA/apg/patterns/tabs/)                        | Tabs -> Tablist = set of tab-elements (serves as label for tabpanel) -> activation displays content of tabpanel; aria and role attributes accurately described |
 
 ## Conclusion