fix: handle url rewrite when querying wrong endpoint

materialious is guilty of this

ythdd_extractor.py

@@ -276,8 +276,8 @@ def generateChannelAvatarsFromUrl(url: str, proxied: bool = True) -> list:
 	# Generates channel avatars at default sizes.
 
 	# avatar urls for channels in search results start with //yt3.ggpht.com/
-	if url.startswith("//yt3.ggpht.com/"):
-		url = url.replace("//yt3.ggpht.com/", "https://yt3.ggpht.com/")
+	if url.startswith("//"):
+		url = "https:" + url
 
 	avatars = []
 	if not url.startswith("https://yt3.ggpht.com/") and not url.startswith("https://yt3.googleusercontent.com/"):