[PATCH] doc: update release note for iavf AVX2 feature

[Wenzhuo Lu]

Add the missed release note for iavf AVX2 feature in 23.07.

Fixes: 5712bf9d6e14 ("net/iavf: add Tx AVX2 offload path")

Signed-off-by: Wenzhuo Lu <wenzhuo.lu at intel.com>
---
 doc/guides/rel_notes/release_23_07.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/doc/guides/rel_notes/release_23_07.rst b/doc/guides/rel_notes/release_23_07.rst
index 4459144..92c8a1d 100644
--- a/doc/guides/rel_notes/release_23_07.rst
+++ b/doc/guides/rel_notes/release_23_07.rst
@@ -200,6 +200,12 @@ New Features
 
   Enhanced the GRO library to support TCP packets over IPv6 network.
 
+* **Updated Intel iavf driver.**
+
+  * Added new RX and TX paths in the AVX2 code to use HW offload
+    features. When the HW offload features are configured to be used, the
+    offload paths are chosen automatically. In parallel the support for HW
+    offload features was removed from the legacy AVX2 paths.
 
 Removed Items
 -------------
-- 
1.8.3.1