Update Doxygen documentation submodule.

4 jobs for master in 3 minutes and 55 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #4779
clang debug kdeorg/ci-suse-qt511

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passed #4781
clang release kdeorg/ci-suse-qt511

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passed #4778
gcc debug kdeorg/ci-suse-qt511

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passed #4780
gcc release kdeorg/ci-suse-qt511

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