|WARNING| pw120131 [PATCH 2/2] doc: update deprecation notice of flow items

[checkpatch at dpdk.org]

Test-Label: checkpatch
Test-Status: WARNING
http://dpdk.org/patch/120131

_coding style issues_


WARNING:TYPO_SPELLING: 'an union' may be misspelled - perhaps 'a union'?
#119: FILE: doc/guides/rel_notes/deprecation.rst:60:
+  may be kept together in an union as a first migration step.

total: 0 errors, 1 warnings, 43 lines checked