fix: never cache frontend files #892

Job	Run time
⬢ Prepare Node.js	19s
🐍 Prepare Python	30s
🔍 Check if pull request	5s
🧱 Build test matrix	7s
📝 Build API docs	51s
🔍 Check	3m 18s
🗃 Build datasets	3m 3s
🧱 Build Spotlight	3m 52s
🧪 Unit Test	1m 39s
🧪 Doc Test	1m 28s
🧪 UI Test (chrome)	4m 27s
🧪 Integration Test (ubuntu-latest, 3.8)	11m 26s
🧪 UI Test (firefox)	5m 10s
🔍 Check wheel contents	45s
🚀 Release Spotlight	0s
	37m 0s

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