fix(openapi): Remove trailing characters in descriptions #1409

Job	Run time
Generate crates matrix	15s
Check crates matrix	2s
Build zebrad crate	35m 46s
Build zebra-utils crate	19m 23s
Build zebra-test crate	1m 34s
Build zebra-state crate	23m 26s
Build zebra-script crate	4m 29s
Build zebra-scan crate	21m 24s
Build zebra-rpc crate	23m 37s
Build zebra-node-services crate	3m 21s
Build zebra-network crate	6m 54s
Build zebra-grpc crate	15m 4s
Build zebra-consensus crate	19m 27s
Build zebra-chain crate	5m 22s
Build tower-fallback crate	1m 6s
Build tower-batch-control crate	1m 28s
Open or update issues for building crates individually failures	0s
	3h 2m 38s

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