Update git submodules

* Update tripleo-heat-templates from branch 'master'
  to 0c0def6f81b6a71f2a07ae4bec9834d8048edb25
  - Fix issues with tox 4.2.4
    
    tox now hard fails if there is mismatch in spec
    attributes[1]. This works around the issue
    temporarily. We probably have to drop py38 jobs
    and specify basepython for py39 target in the
    future.
    
    [1] tox-dev/tox#2824
    
    Closes-Bug: #2002035
    Change-Id: I4256a51afd011048eaaaf5d3c225ab36f75708ed