chore: update version to v0.5.0

Author: euxx

package.json

@@ -1,8 +1,8 @@
 {
   "name": "github-copilot-usage",
   "displayName": "GitHub Copilot Usage",
-  "version": "0.4.4",
-  "description": "Show GitHub Copilot Premium requests usage in the status bar.",
+  "version": "0.5.0",
+  "description": "Show GitHub Copilot Premium requests / Credits usage in the status bar.",
   "categories": [
     "Other"
   ],