Fix channel search json parse to not raise

Author: matthewmcgarvey

src/invidious/search.cr

@@ -5,7 +5,7 @@ def channel_search(query, page, channel)
     response = YT_POOL.client &.get("/user/#{channel}")
     response = YT_POOL.client &.get("/c/#{channel}") if response.status_code == 404
     initial_data = extract_initial_data(response.body)
-    ucid = initial_data["header"]["c4TabbedHeaderRenderer"]?.try &.["channelId"].as_s?
+    ucid = initial_data.dig?("header", "c4TabbedHeaderRenderer", "channelId").try(&.as_s?)
     raise InfoException.new("Impossible to extract channel ID from page") if !ucid
   else
     ucid = channel