Update dependency doctrine/orm to v2.16.2

This MR contains the following updates:

Package	Type	Update	Change
doctrine/orm (source)	require	patch	2.16.1 -> 2.16.2

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Release Notes

doctrine/orm (doctrine/orm)

v2.16.2

Compare Source

Release Notes for 2.16.2

2.16.x bugfix release (patch)

2.16.2

• Total issues resolved: 0
• Total pull requests resolved: 5
• Total contributors: 5

Bugfixes

• 10915: Mitigate problems with EntityManager::flush() reentrance since 2.16.0 (Take 2) thanks to @​mpdude

Static Analysis

• 10907: Add back throws annotation to getSingleScalarResult thanks to @​darenas31415

Documentation

• 10923: basic-mapping: fix new-line rendered in output thanks to @​kaznovac
• 10916: Use required classes for Lifecycle Callback examples thanks to @​SerheyDolgushev
• 10904: Fix link on known issues docs thanks to @​hockdudu

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