Add UXL identity to README #2791

Job	Run time
codespell	14s
examples_clang-format	5s
examples_ubuntu-latest_g++_cxx14_relwithdebinfo_preview=OFF	3m 30s
examples_ubuntu-20.04_g++_cxx17_release_preview=ON	3m 38s
copyright_check	7s
ubuntu-latest_g++_cxx14_relwithdebinfo_preview=OFF	19m 0s
examples_ubuntu-20.04_g++-10_cxx20_debug_preview=ON	4m 13s
examples_macos-12_clang++_cxx14_relwithdebinfo_preview=ON	4m 22s
ubuntu-20.04_g++_cxx17_release_preview=ON	16m 12s
macos-12_clang++_cxx14_relwithdebinfo_preview=ON	15m 21s
ubuntu-20.04_g++-10_cxx20_debug_preview=ON	13m 10s
python_module_test_ubuntu_latest	31s
macos-13_clang++_cxx20_release_preview=ON-DBUILD_SHARED_LIBS=OFF	15m 5s
ubuntu-22.04_g++-11_cxx20_release_preview=ON-DBUILD_SHARED_LIBS=OFF	16m 12s
examples_windows_cl2019_cxx14_relwithdebinfo_preview=ON	5m 52s
examples_windows_cl2022_cxx17_relwithdebinfo_preview=OFF	5m 54s
windows_cl2019_cxx14_relwithdebinfo_preview=ON	13m 51s
windows_cl2019_cxx20_release_preview=ON-DBUILD_SHARED_LIBS=OFF	19m 42s
windows_cl2022_cxx17_relwithdebinfo_preview=OFF	14m 44s
documentation	56s
pages	0s
	2h 52m 39s

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