Add installation link to readme. #98

Job	Run time
ubu-24 \| g++-14 \| c++2b \| libstdc++ \| ubuntu-24.04	7m 15s
ubu-24 \| clang++-19 \| c++23 \| libc++-18-dev \| ubuntu-24.04	10m 17s
ubu-24 \| g++-13 \| c++2b \| libstdc++ \| ubuntu-24.04	8m 16s
mac-14 \| clang++ \| c++2b \| default \| macos-14	3m 18s
ubu-22 \| clang++-15 \| c++20 \| libstdc++ \| ubuntu-22.04	6m 1s
ubu-22 \| clang++-15 \| c++20 \| libc++-15-dev \| ubuntu-22.04	6m 56s
ubu-24 \| clang++-19 \| c++20 \| libstdc++ \| ubuntu-24.04	9m 31s
win-22 \| cl.exe \| c++20 \| default \| windows-2022	1m 5s
win-22 \| cl.exe \| c++latest \| default \| windows-2022	36s
mac-13 \| clang++-15 \| c++2b \| default \| macos-13	8m 5s
mac-13 \| clang++ \| c++2b \| default \| macos-13	7m 14s
aggregate-results	7s
	1h 8m 41s

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