Merge pull request #7685 from rubygems/martinemde/fix-speeling

Fiks speeling cott bye codespell

(cherry picked from commit 6681911)

Author: simi

.codespellignore

@@ -1,4 +1,5 @@
 crate
+checkin
 falsy
 filetest
 fo

CHANGELOG.md

@@ -5949,7 +5949,7 @@ There has been some minor usability enhancements and changes ...
   This *greatly* speeds up gem commands run in non-admin mode when the
   site-wide cache is out of date.
 * The gem command now used an HTTP HEAD command to detect if the
-  server's source index needs to be downloaed.
+  server's source index needs to be downloaded.
 * gem check gemname --test will run unit tests on installed gems that
   have unit tests.
 * Multiple gem names are allowed on the gem install command line.