runtime: Fix typos in various files

closes: #12836

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Viktor Szépe <viktor@szepe.net>
diff --git a/runtime/syntax/8th.vim b/runtime/syntax/8th.vim
index ce27d10..643c9cb 100644
--- a/runtime/syntax/8th.vim
+++ b/runtime/syntax/8th.vim
@@ -363,7 +363,7 @@
 if !exists("did_eighth_syntax_inits")
     let did_eighth_syntax_inits=1
 
-    " The default methods for highlighting. Can be overriden later.
+    " The default methods for highlighting. Can be overridden later.
     hi def link eighthTodo Todo
     hi def link eighthOperators Operator
     hi def link eighthMath Number