[DOCS] Fix EQL syntax formatting (#65711) (#65744)

Co-authored-by: Howard <[email protected]>

Author: jrodewig

docs/reference/eql/syntax.asciidoc

@@ -203,11 +203,11 @@ and  or  not
 
 `and`::
 Returns `true` only if the condition to the left and right _both_ return `true`.
-Otherwise returns `false.
+Otherwise returns `false`.
 
 `or`::
 Returns `true` if one of the conditions to the left or right `true`.
-Otherwise returns `false.
+Otherwise returns `false`.
 
 `not`::
 Returns `true` if the condition to the right is `false`.