linux

Switch to supported ubuntu image #7936

Job	Run time
build (g++-4.9, Debug, 11)	18s
build (g++-4.9, Release, 11)	2s
build (g++-11, Debug, 11)	1m 8s
build (g++-11, Release, 11)	35s
build (clang++-11, Debug, 11)	1m 28s
build (clang++-11, Release, 11)	1m 12s
build (g++-11, Debug, 14, sudo apt install g++-11)	1m 15s
build (g++-11, Debug, 17)	56s
build (g++-11, Debug, 20, sudo apt install g++-11)	50s
build (clang++-11, Debug, 17, -stdlib=libc++, sudo apt install clang-11 libc++-11-dev libc++abi-1...	2m 3s
build (clang++-11, Debug, 17, -DFMT_FUZZ=ON -DFMT_FUZZ_LINKMAIN=ON, sudo apt install clang-11)	1m 34s
build (g++-13, Release, 23, -DBUILD_SHARED_LIBS=ON, sudo apt install g++-13)	35s
	11m 56s

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