Update git submodules

* Update docs/submodules/optf/has.git from branch 'master'
  to 8794f07cf11c768876b62ba6628f88f723536eec
  - Merge "Update Casablanca maintenance release notes"
  - Update Casablanca maintenance release notes
    
    Issue-ID: OPTFRA-401
    Change-Id: I0bd03366e3833fa65a206ef7f2a98efb50b3fd8f
    Signed-off-by: Shankar Narayanan <snarayanan@research.att.com>
    
diff --git a/docs/submodules/optf/has.git b/docs/submodules/optf/has.git
index 1e635c3..8794f07 160000
--- a/docs/submodules/optf/has.git
+++ b/docs/submodules/optf/has.git
@@ -1 +1 @@
-Subproject commit 1e635c3ce0efe9592be2ea5d6a70d8b75301b7ad
+Subproject commit 8794f07cf11c768876b62ba6628f88f723536eec