Update dependency openstacksdk to v4.16.0 (#142)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/requirements.in

@@ -1 +1 @@
-openstacksdk ==4.15.0
+openstacksdk ==4.16.0

.github/workflows/requirements.txt

@@ -28,7 +28,7 @@ jsonpointer==3.1.1
     # via jsonpatch
 keystoneauth1==5.14.0
     # via openstacksdk
-openstacksdk==4.15.0
+openstacksdk==4.16.0
     # via -r .github/workflows/requirements.in
 os-service-types==1.8.2
     # via