Fix README.md typos #45

Job	Run time
setup-matrix	24s
test (ubuntu-latest, accounting)	1m 59s
test (ubuntu-latest, auth)	3m 17s
test (ubuntu-latest, b2b)	6m 38s
test (ubuntu-latest, dialog)	3m 20s
test (ubuntu-latest, permissions)	1m 26s
test (ubuntu-latest, presence)	1m 7s
test (ubuntu-latest, record-route)	59s
test (ubuntu-latest, registration)	5m 19s
test (ubuntu-latest, startup)	1m 51s
test (ubuntu-latest, stir-shaken)	5m 32s
test (ubuntu-latest, topology-hiding)	3m 32s
test (ubuntu-latest, uac-auth)	3m 2s
	38m 26s

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