Adjust URL for a page of runs

In the name of shorter URLs, I'd like to omit `/runs/`
when a year would follow it.
Run URLs are already e.g. `/2018/pyladies-brno-jaro/`,
so there should be a `/2018/` URL.
(Of course, there's also `/runs/` and `/runs/all/`,
so `/runs/2018/` did make sense. A bit less sense, though, IMO.)

Author: encukou

naucse/views.py

@@ -100,7 +100,7 @@ def index():
 
 
 @app.route('/runs/')
-@app.route('/runs/<int:year>/')
+@app.route('/<int:year>/')
 @app.route('/runs/<any(all):all>/')
 def runs(year=None, all=None):
     today = datetime.date.today()