Bump RedCloth from 4.2.9 to 4.3.2 in /docker/docsite #1936

Job	Run time
linux-gcc-6-3 / initialize	1s
linux-x64 / initialize	1s
linux-modular / initialize	1s
linux-clang-3-9 / initialize	1s
linux-clang-3-9 / docker-build-image	1s
linux-clang-3-9 / docker-unittest-image	1s
linux-x64 / docker-build-image	1s
linux-x64 / docker-unittest-image	1s
linux-modular / docker-unittest-image	1s
linux-modular / docker-build-image	1s
linux-gcc-6-3 / docker-build-image	1s
linux-gcc-6-3 / docker-unittest-image	1s
linux-clang-3-9 / ${{ matrix.name }}_${{ matrix.config }}	1s
linux-x64 / ${{ matrix.name }}_${{ matrix.config }}	1s
linux-modular / ${{ matrix.name }}_${{ matrix.config }}	1s
linux-gcc-6-3 / ${{ matrix.name }}_${{ matrix.config }}	1s
linux-clang-3-9 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	1s
linux-clang-3-9 / ${{ matrix.name }}_${{ matrix.shard }}_test	1s
linux-x64 / ${{ matrix.name }}_${{ matrix.shard }}_test	1s
linux-x64 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	1s
linux-modular / ${{ matrix.name }}_on_device_${{ matrix.shard }}	1s
linux-modular / ${{ matrix.name }}_${{ matrix.shard }}_test	1s
linux-gcc-6-3 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	1s
linux-gcc-6-3 / ${{ matrix.name }}_${{ matrix.shard }}_test	1s
	24s

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