Update to sonic-swss-202106 branch, and incldue the following commit

judyjoseph · judyjoseph · commit e0f72470bfbb · 2021-08-10T11:25:47.000-07:00
97a108f Code changes to support IPv6 Link local enhancements (sonic-net#1463)
diff --git a/src/sonic-swss b/src/sonic-swss
@@ -1 +1 @@
-Subproject commit 4f1d726d4cbf8a283b22cd5f612cf03ca21a27b3
+Subproject commit 97a108f852b2a5a50ebd90c9953206db5cbe73b8
