chore: update ubuntu linux badge #506

Job	Run time
build (ubuntu-latest, Release, clang)	3m 55s
build (windows-latest, Release, cl)	3m 41s
build (macos-latest, Release, clang)	3m 45s
build (ubuntu-latest, Debug, gcc)	2m 50s
build (macos-latest, Debug, clang)	1m 29s
build (ubuntu-latest, Release, gcc)	3m 22s
build (ubuntu-latest, Debug, clang)	2m 50s
build (windows-latest, Debug, cl)	3m 1s
	24m 53s

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