Fix pa11y use

docs/miscellaneous/accessibility.md

@@ -22,7 +22,7 @@ pa11y https://data.beta.grandlyon.com/fr/accueil --ignore "warning;notice"
 npm install -g pa11y-ci
 ```
 
-Then create a **.pa11y1** json file.
+Then create a **.pa11yci** json file.
 ```
 {
   "urls": [