fix: wcag techniques content

slides/visual-intro.md

@@ -4,5 +4,5 @@ Wichtige WCAG-Richtlinie: «[1.4 Distinguishable](https://www.w3.org/WAI/WCAG22/
 
 Kriterien (Auswahl):
 - [1.4.1 Use of Color](https://www.w3.org/WAI/WCAG22/quickref/?showtechniques=141#distinguishable): **Color is not used as the only visual means** of conveying information, indicating an action, prompting a response, or distinguishing a visual element. (Level A): 
-    - [G183](https://www.w3.org/WAI/WCAG22/Techniques/general/G183.html): Using a contrast ratio of 3:1 with surrounding text and providing additional visual cues on focus for links or controls where color alone is used to identify them
+    - [G183](https://www.w3.org/WAI/WCAG22/Techniques/general/G183.html): Using a contrast ratio of 3:1 with surrounding text and providing additional visual cues on hover for links or controls where color alone is used to identify them
 - [1.4.3 Contrast (Minimum)](https://www.w3.org/WAI/WCAG22/quickref/?showtechniques=143#contrast-minimum): The visual presentation of text and images of text has a **contrast ratio of at least 4.5:1**, except for the following: (Level AA) …