chore(deps): update plugin org.openapi.generator to v7.8.0 #1256

Job	Run time
prepare-release / 🛫 Prepare release	10s
🔨 Build and test backend service / report	1m 44s
🔨 Build and push Docker image / report	19s
github-release / 🎉 Release	0s
	2m 13s

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