Update git submodules

* Update docs/submodules/vswitchperf from branch 'master'
  - Merge "ci: Fix path to CI report"
  - ci: Fix path to CI report

    Index file of CI report was restored and paths to it updated
    to reflect new documentation structure.

    JIRA: VSPERF-514

    Change-Id: Id92eb2003a9e6737652313f7ecd03d48a0bfd2ce
    Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
    Reviewed-by: Al Morton <acmorton@att.com>
    Reviewed-by: Christian Trautman <ctrautma@redhat.com>
    Reviewed-by: Sridhar Rao <sridhar.rao@spirent.com>
    Reviewed-by: Trevor Cooper <trevor.cooper@intel.com>

diff --git a/docs/submodules/vswitchperf b/docs/submodules/vswitchperf
index 0145538..73025ba 160000 (submodule)
--- a/docs/submodules/vswitchperf
+++ b/docs/submodules/vswitchperf
@@ -1 +1 @@
-Subproject commit 01455386f7186721ffd7578d95a84580a5ff7087
+Subproject commit 73025baf2e393c61c59957e8714d2ddd54d25e51