tpm2_policynv.md Fix examples. #1829

Job	Run time
coverage-test	6m 20s
coverity-test	0s
build-test (ubuntu-20.04, gcc)	5m 49s
build-test (ubuntu-20.04, clang)	4m 49s
master-tss-build-test (gcc)	17m 58s
build-test (fedora-30, gcc)	5m 58s
master-tss-build-test (clang)	4m 55s
build-test (fedora-30, clang)	5m 12s
build-test (opensuse-leap, gcc)	6m 8s
build-test (opensuse-leap, clang)	5m 16s
build-test (fedora-32, gcc)	5m 47s
build-test (fedora-32, clang)	5m 10s
build-test (ubuntu-22.04, gcc)	11m 27s
build-test (ubuntu-22.04, clang)	10m 42s
	1h 35m 31s

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