Update git submodules

* Update docs/submodules/pharos from branch 'master'
  - Merge "config/utils: YAML: Use C bindings if available"
  - config/utils: YAML: Use C bindings if available

    Time diff before/after this change for the same template via
    generate_config expansion:
    -user    0m0.144s
    +user    0m0.096s

    Change-Id: Id574afcd8a74a530d791ebed8b72ccae53703611
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/pharos b/docs/submodules/pharos
index 8732587..511ba77 160000 (submodule)
--- a/docs/submodules/pharos
+++ b/docs/submodules/pharos
@@ -1 +1 @@
-Subproject commit 87325878949d5a315535720828af5185ebaa7a9f
+Subproject commit 511ba774f11a6293d9f5635c08204c775bff583a