Fixing the extra comma

Author: abchatra

pxt.json

@@ -15,7 +15,7 @@
         "_locales/de/neopixel-jsdoc-strings.json",
         "_locales/fr/neopixel-strings.json",
         "_locales/fr/neopixel-jsdoc-strings.json",
-        "_locales/zh/neopixel-strings.json",
+        "_locales/zh/neopixel-strings.json"
     ],
     "testFiles": [
         "neotest.ts"