Update git submodules

* Update docs/submodules/policy/apex-pdp.git from branch 'master'
  to 423e98641ca7fe79a1b1bb897aa8a4b17ba5ee4d
  - Replace non-Javadoc comments with inheritDocs
    
    Copyright headers not changed as this review only amends comments.
    
    Issue-ID: POLICY-1791
    Change-Id: Icbeb2c6e591b3b160ae102bb67aef2d407924a4d
    Signed-off-by: liamfallon <liam.fallon@est.tech>
    
1 file changed