minor #7047 Fix typo in doctrine.rst (to manage) (lacyrhoades)

This PR was submitted for the master branch but it was merged into the 2.7 branch instead (closes #7047).

Discussion
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Fix typo in doctrine.rst (to manage)

Commits
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70d44f6 Fix typo in doctrine.rst (to manage)

Author: xabbuh

doctrine.rst

@@ -830,7 +830,7 @@ list of all available types and more information, see Doctrine's
 Relationships and Associations
 ------------------------------
 
-Doctrine provides all the functionality you need to manager database relationships
+Doctrine provides all the functionality you need to manage database relationships
 (also known as associations). For info, see :doc:`/doctrine/associations`.
 
 Final Thoughts