CHANGES and bump version for developer snapshot v1.12.4.4 #3921

Job	Run time
clang-format verification	1s
macos-10.15 appleclang12/C++14 py3.9 llvm11	1s
Ubuntu Debug gcc7/C++14 llvm9 py2.7 oiio2.3 exr2.4 sse4 boost1.65 exr2.4	1s
macos-11 appleclang13/C++17 py3.9 llvm11	1s
VFX2019 gcc6/C++14 llvm9 py2.7 boost1.66 exr2.3 oiio2.2 sse2	1s
Ubuntu gcc10/C++17 llvm10 oiio-release boost1.65 exr2.5 avx2	1s
VFX2019 clang9/C++14 llvm9 oiio-release boost1.66 avx2 exr2.3 py2.7	1s
Ubuntu latest releases gcc11/C++17 llvm12 boost1.71 exr3.1 py3.8 avx2 batch-b16avx512	1s
VFX2019 GPU Cuda10 gcc6/C++14 llvm10 py2.7 boost-1.70 exr-2.3 OIIO-master avx2	1s
Ubuntu bleeding edge gcc11/C++17 llvm13 oiio/ocio/exr/pybind-master boost1.71 py3.9 avx2 batch-b16avx512	1s
VFX2020 gcc6/C++14 llvm10 py3.7 boost1.70 exr2.4 oiio2.2 sse4	1s
VFX2021 gcc9/C++17 llvm11 py3.7 boost1.73 exr2.5 oiio2.2 avx2 batch-b8avx2	1s
VFX2022 gcc9/C++17 llvm13 py3.9 boost1.76 exr3.1 oiio2.3 avx2	1s
VFX2022 clang12/C++17 llvm12 oiio-master boost1.73 exr3.1 py3.9 avx2 batch-avx512	1s
VFX2022 icc/C++17 llvm13 py3.9 boost1.76 exr3.1 oiio-master avx2	1s
VFX2022 icx/C++17 llvm13 py3.9 boost1.76 exr3.1 oiio2.3 avx2	1s
VFX2019 oldest everything gcc6/C++14 llvm9 py2.7 boost1.66 oiio2.2 no-simd exr2.3	1s
	17s

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