Increase code font size on sourcegraph

Change the font size on sourcegraph. Current font is too small. Used code from https://somethingididnotknow.wordpress.com/2013/07/01/change-page-styles-with-greasemonkeytampermonkey/

ئاپتورى
wangxiaodiu
بۈگۈن قاچىلانغىنى
0
جەمئىي قاچىلانغىنى
30
باھا نومۇرى
1 0 0
نەشرى
0.1
قۇرۇلغان ۋاقتى
2021-01-18
يېڭىلانغان ۋاقتى
2021-01-18
ئىجازەتنامىسى
يوق
قوللايدىغىنى

Increase the code font size on sourcegraph.com from 12px (original) to 16px.