fix missed 1.79 -> 1.84.1 rust version update #7896

Job	Run time
verify-code-formatting	23s
clippy	3m 35s
workflow-setup	22s
build-docker-vdrproxy	2m 47s
test-unit-workspace	1m 50s
test-integration-aries-vcx (askar_wallet,anoncreds)	5m 55s
workflow-setup-check	1s
build-docker-aath-backchannel	0s
test-integration-aries-vcx-ledger	1m 41s
test-integration-did-crate	1m 49s
publish-docker-aath-backchannel	0s
test-integration-aries-vcx-vdrproxy	0s
publish-docker-vdrproxy	0s
make-release	0s
	18m 23s

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