chore: update keywords

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

Author: kgryte

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

@@ -136,8 +136,7 @@
         "dilogarithm",
         "polylogarithm",
         "integral",
-        "spence",
-        "number"
+        "spence"
       ],
       "extra_keywords": []
     }