docs: update keywords

Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/math/base/special/acoth/package.json

@@ -152,7 +152,7 @@
         "angle"
       ],
       "extra_keywords": [
-        "math.acot"
+        "math.atanh"
       ]
     }
   }