chore(deps): bump open_api_spex from 3.18.2 to 3.18.3 (#888) #2925

Job	Run time
Download spectests	7s
Download Beacon Node OAPI	9s
Build native libraries	22s
Lint	2m 3s
Start and stop the node	3m 59s
Build project	6m 36s
Run spec-tests (capella, minimal)	7m 37s
Test	3m 52s
Run spec-tests (capella, general)	5m 5s
Run spec-tests (capella, mainnet)	6m 57s
Run spec-tests (deneb, minimal)	8m 19s
Run spec-tests (deneb, general)	4m 56s
Run spec-tests (deneb, mainnet)	7m 3s
All spec-tests passed	1s
	57m 6s

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