docs: fix simple typo, descibe -> describe

There is a small typo in june/filters.py.

Should read `describe` rather than `descibe`.

Signed-off-by: Tim Gates <tim.gates@iress.com>

june/filters.py

@@ -104,7 +104,7 @@ def link(self, link, title, content):
         width = 650
         height = 366
         if title:
-            # title can descibe height and width: 650 x 366
+            # title can describe height and width: 650 x 366
             pattern = r'(\d{3,4})[^\d]+(\d{3})'
             match = re.match(pattern, title)
             if match: