Add redirect for /wiki to CSS Wiki

Signed-off-by: Matty Widdop <18513864+MattyTheHacker@users.noreply.github.com>

Author: MattyTheHacker

_redirects

@@ -13,6 +13,7 @@
 
 # Resources
 /resources https://www.github.com/CSSUoB/resources
+/wiki https://wiki.cssbham.com
 
 # Socials
 /facebook https://facebook.com/groups/CSSUoB