Use dedicated exception for outdated H5 datasets #929

Job	Run time
🐍 Prepare Python	1m 8s
⬢ Prepare Node.js	19s
🔍 Check if pull request	3s
🧱 Build test matrix	9s
🧱 Build Spotlight	3m 37s
🔍 Check	2m 13s
📝 Build API docs	41s
🗃 Build datasets	3m 5s
🧪 Doc Test	1m 5s
🧪 Unit Test	1m 26s
🔍 Check wheel contents	34s
🧪 UI Test (chrome)	3m 48s
🧪 Integration Test (ubuntu-latest, 3.8)	10m 52s
🧪 UI Test (firefox)	4m 1s
🚀 Release Spotlight	0s
	33m 1s

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