Fix typos in readme file

Author: Alhadis

README.md

@@ -25,7 +25,7 @@ This is not an exhaustive list, but are the most useful.
 
 ### `doom-snippets-expand PROPERTY VALUE &optional MODE`
 
-This is primarily used for create snippet aliases. A snippet alias if a snippet
+This is primarily used for creating snippet aliases. A snippet alias is a snippet
 that will expand another snippet when used. e.g.
 
 **In `js-mode/class`:**
@@ -89,12 +89,12 @@ while true {
 
 `PROPERTY` can be `:uuid`, `:name`, `:key` or `:file`, and `MODE` restricts the
 snippet search to a certain snippet table (by major mode). It isn't wise to use
-`MODE` to reference snippets for oher major modes, because it will only see
+`MODE` to reference snippets for other major modes, because it will only see
 snippets that yasnippet have already loaded (and it lazy loads each table).
 
 ### `doom-snippets-without-trigger &rest BODY`
 
-Preforms `BODY` after moving the point to the start of the trigger keyword.
+Performs `BODY` after moving the point to the start of the trigger keyword.
 
 Without this, tests like `bolp` would meaninglessly fail because the cursor is
 always in front of the word that triggered this snippet.