Fixes 'unkown' typo in dynamic routing logging. #3436

Job	Run time
osx clang --disable-ssl	2m 22s
osx clang --disable-ssl	2m 22s
Prepare container	2m 17s
Prepare container	3m 5s
linux rpm fedora	7m 2s
linux rpm fedora	7m 2s
linux ${{ join(matrix.cfg[*], ' ') }}	0s
linux gcc --disable-ssl	2m 34s
linux clang --disable-ssl	2m 43s
linux gcc test -300	9m 56s
linux gcc test 301-600	7m 43s
linux gcc test 601- unstable	7m 43s
linux clang test sanitizers -300	13m 12s
linux clang test sanitizers 301-600	10m 1s
linux clang test sanitizers 601- unstable	12m 12s
linux gcc test -ljemalloc -300	10m 16s
linux gcc test -ljemalloc 301-600	7m 33s
linux gcc test -ljemalloc 601- unstable	7m 43s
linux gcc system-test-dpdk dpdk -100	16m 40s
linux gcc system-test-dpdk dpdk 101- unstable	16m 55s
linux gcc system-test-userspace -100	15m 41s
linux gcc system-test-userspace 101- unstable	15m 44s
linux gcc system-test -100	20m 37s
linux gcc system-test 101- unstable	24m 39s
linux clang system-test sanitizers -100	22m 7s
linux clang system-test sanitizers 101- unstable	27m 16s
linux x86 gcc --disable-ssl	2m 43s
	4h 38m 8s

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