style(typos): correct a few typos (#1776)

## Description

<!-- Describe the big picture of your changes to communicate to the
maintainers
  why we should accept this pull request. -->
This PR just fixes a few typos :)

`dont => don't`
## Related Issue(s)

<!--
  If this PR fixes any issues, please link to the issue here.
  - Fixes #<issue_number>
-->

## Screenshots

<!-- Add screenshots of the changes if applicable. -->

lua/lazy/core/config.lua

@@ -218,7 +218,7 @@ M.defaults = {
     enabled = true,
     root = vim.fn.stdpath("state") .. "/lazy/readme",
     files = { "README.md", "lua/**/README.md" },
-    -- only generate markdown helptags for plugins that dont have docs
+    -- only generate markdown helptags for plugins that don't have docs
     skip_if_doc_exists = true,
   },
   state = vim.fn.stdpath("state") .. "/lazy/state.json", -- state info for checker and other things

lua/lazy/manage/task/git.lua

@@ -335,7 +335,7 @@ M.checkout = {
       end
     end
 
-    -- dont run checkout if target is already reached.
+    -- don't run checkout if target is already reached.
     -- unless we just cloned, since then we won't have any data yet
     if Git.eq(info, target) and info.branch == target.branch then
       self.plugin._.updated = {