Fix uint8c, uint8c promotion to match C rules

Author: kgryte

lib/node_modules/@stdlib/ndarray/promotion-rules/lib/promotion_rules.json

@@ -128,7 +128,7 @@
 		"uint32": "uint32",
 		"uint16": "uint16",
 		"uint8": "uint8",
-		"uint8c": "uint8",
+		"uint8c": "uint8c",
 		"complex64": "complex64",
 		"complex128": "complex128",
 		"binary": -1,