Combine lh*(-**).googleusercontent.com URL regex into one line.

Co-authored-by: Mike Fährmann <[email protected]>

gallery_dl/extractor/blogger.py

@@ -37,8 +37,7 @@ def items(self):
         findall_image = re.compile(
             r'src="(https?://(?:'
             r'blogger\.googleusercontent\.com/img|'
-            r'lh\d+\.googleusercontent\.com|'
-            r'lh\d+-\w+\.googleusercontent\.com|'
+            r'lh\d+(?:-\w+)?\.googleusercontent\.com|'
             r'\d+\.bp\.blogspot\.com)/[^"]+)').findall
         findall_video = re.compile(
             r'src="(https?://www\.blogger\.com/video\.g\?token=[^"]+)').findall