Fix spelling mistakes, add more icon files.

manifest.json

@@ -1,7 +1,7 @@
 {
   "name": "Privacy Redirect",
   "description": "Redirects Twitter & Youtube requests to privacy friendly alternatives (Nitter & Invidious).",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "manifest_version": 2,
   "background": {
     "scripts": [
@@ -9,6 +9,8 @@
     ]
   },
   "icons": {
+    "16": "img/icon16.png",
+    "32": "img/icon32.png",
     "48": "img/icon48.png",
     "128": "img/icon128.png"
   },