Update git submodules

* Update docs/submodules/policy/parent.git from branch 'master'
  to 87b40377097221ce2b3699df8032bc03df630904
  - Merge "Apex-pdp documentation conversion for DecisionMaker example"
  - Apex-pdp documentation conversion for DecisionMaker example

    Issue-ID: POLICY-2399
    Signed-off-by: aditya.puthuparambil <aditya.puthuparambil@est.tech>
    Change-Id: I9fc825bc1010a53a159572656957d899d9a52aa9

diff --git a/docs/submodules/policy/parent.git b/docs/submodules/policy/parent.git
index 68c4e1b..87b4037 160000 (submodule)
--- a/docs/submodules/policy/parent.git
+++ b/docs/submodules/policy/parent.git
@@ -1 +1 @@
-Subproject commit 68c4e1b783016c1a54fd97cfb0cc87766fbf284a
+Subproject commit 87b40377097221ce2b3699df8032bc03df630904