Fix various typos (#17621)

Found via `codespell -q 3 -S ./CHANGELOG.md,./AUTHORS.md,./config/locales,./app/javascript/mastodon/locales -L ba,keypair,medias,ro`

app/javascript/mastodon/features/emoji/emoji_compressed.js

@@ -90,7 +90,7 @@ Object.keys(emojiIndex.emojis).forEach(key => {
   let { short_names, search, unified } = emojiMartData.emojis[key];
 
   if (short_names[0] !== key) {
-    throw new Error('The compresser expects the first short_code to be the ' +
+    throw new Error('The compressor expects the first short_code to be the ' +
       'key. It may need to be rewritten if the emoji change such that this ' +
       'is no longer the case.');
   }