Add 'Switch Invidious Instance' to en locale

locales/en-US.json

@@ -161,6 +161,7 @@
     "Show more": "Show more",
     "Show less": "Show less",
     "Watch on YouTube": "Watch on YouTube",
+    "Switch Invidious Instance": "Switch Invidious Instance",
     "Hide annotations": "Hide annotations",
     "Show annotations": "Show annotations",
     "Genre: ": "Genre: ",