Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to 6c1984839109f1dea6514998018f7c10f1dae764
  - Update SDNC helm charts to use latest stable version 1.7.6
    
    Update SDNC helm charts to use latest stable version (1.7.6)
    
    Change-Id: I98a360cd16e14d8da914278da2509e2c07c2cf5c
    Issue-ID: SDNC-992
    Signed-off-by: Timoney, Dan (dt5972) <dtimoney@att.com>
    
diff --git a/docs/submodules/oom.git b/docs/submodules/oom.git
index 41041fc..6c19848 160000
--- a/docs/submodules/oom.git
+++ b/docs/submodules/oom.git
@@ -1 +1 @@
-Subproject commit 41041fce7009965f5a0da872d5efa4ab1c937f38
+Subproject commit 6c1984839109f1dea6514998018f7c10f1dae764