Update git submodules

* Update helpcontent2 from branch 'master'
  - tdf#124245 Polyfills and fixes for IE11
    
    The polyfills can be removed after we drop IE11 support.
    
    Other IE11 fixes:
    
    Change from document.URL to window.location.pathname
    because otherwise we get local Windows paths with backward
    slashes.
    
    Use clear: left; for google-donation element so it doesn't
    float on top of other elements.
    
    Don't use defer to load fuzzysort.js and prism.js.
    
    Change-Id: I6c0143eab555c8b1fbdbde8e749a24baed2f69c8
    Reviewed-on: https://gerrit.libreoffice.org/69549
    Tested-by: Jenkins
Reviewed-by: himajin100000 <himajin100000@gmail.com>
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
    

helpcontent2 @ ca2a6bf2

-Subproject commit 9b776454d95f5c6bf13c0ca5508c0b2225aa4c1c
+Subproject commit ca2a6bf2c3c59d106f1c6ad432eab21f696c23fc