516 compatibility for browsers (#20652)

this is a bit of

https://github.com/cmss13-devs/cmss13/pull/8646
https://github.com/cmss13-devs/cmss13/pull/8875
https://github.com/cmss13-devs/cmss13/pull/8606
https://github.com/cmss13-devs/cmss13/pull/8607
https://github.com/cmss13-devs/cmss13/pull/8359
https://github.com/cmss13-devs/cmss13/pull/7860
( and thus https://github.com/ParadiseSS13/Paradise/pull/25105
https://github.com/ParadiseSS13/Paradise/pull/25205
https://github.com/ParadiseSS13/Paradise/pull/25363
https://github.com/ParadiseSS13/Paradise/pull/26423 and
https://github.com/ParadiseSS13/Paradise/pull/26433 )
https://github.com/tgstation/tgstation/pull/89766

in order to work properly - using the efficient storage method, instead
of the byond json method - github pages needs to be enabled and built
from the gh-pages branch. because yeah

---------

Co-authored-by: harryob <55142896+harryob@users.noreply.github.com>

code/modules/mob/language/language.dm

@@ -390,7 +390,7 @@
 			if(L.written_style)
 				dat += "You can write in this language on papers by writing \[lang=[L.key]\]YourTextHere\[/lang\].<br/><br/>"
 
-	src << browse(dat, "window=checklanguage")
+	src << browse(HTML_SKELETON(dat), "window=checklanguage")
 	return
 
 /mob/living/check_languages()
@@ -410,7 +410,7 @@
 			if(L.written_style)
 				dat += "You can write in this language on papers by writing \[lang=[L.key]\]YourTextHere\[/lang\].<br/><br/>"
 
-	src << browse(dat, "window=checklanguage")
+	src << browse(HTML_SKELETON(dat), "window=checklanguage")
 
 /mob/living/Topic(href, href_list)
 	if(href_list["default_lang"])