minor symfony#48009 Fix Typos In Comments 6.1+ (PhilETaylor)

This PR was merged into the 6.1 branch.

Discussion
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Fix Typos In Comments 6.1+

simple typo fix

Commits
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f0a2bf6 typo s/retrieveing/retrieving

Author: fabpot

src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php

@@ -25,7 +25,7 @@
  * Implements simple and robust tag-based invalidation suitable for use with volatile caches.
  *
  * This adapter works by storing a version for each tags. When saving an item, it is stored together with its tags and
- * their corresponding versions. When retrieveing an item, those tag versions are compared to the current version of
+ * their corresponding versions. When retrieving an item, those tag versions are compared to the current version of
  * each tags. Invalidation is achieved by deleting tags, thereby ensuring that their versions change even when the
  * storage is out of space. When versions of non-existing tags are requested for item commits, this adapter assigns a
  * new random version to them.