Ignore case on shortcuts.vdf regex

There's a project called "pysteam" that is generating shortcuts with
different cases than Steam.

games.go

@@ -105,7 +105,7 @@ func addNonSteamGames(user User, games map[string]*Game) {
 
 	// The actual binary format is known, but using regexes is way easier than
 	// parsing the entire file. If I run into any problems I'll replace this.
-	gamePattern := regexp.MustCompile("appname\x00(.+?)\x00\x01exe\x00(.+?)\x00\x01.+?\x00tags\x00(.*?)\x08\x08")
+	gamePattern := regexp.MustCompile("(?i)appname\x00(.+?)\x00\x01exe\x00(.+?)\x00\x01.+?\x00tags\x00(.*?)\x08\x08")
 	tagsPattern := regexp.MustCompile("\\d\x00(.+?)\x00")
 	for _, gameGroups := range gamePattern.FindAllSubmatch(shortcutBytes, -1) {
 		gameName := gameGroups[1]