build(deps): bump i18next from 23.14.0 to 23.15.1 in /frontend in the i18next group #29

Job	Run time
Check frontend style	1m 11s
Run `cargo deny` checks	27s
Check schema	5m 43s
Run the frontend test suite	53s
Lint and test OPA policies	4s
Check Rust style	15s
Check syn2mas	23s
Run Clippy	2m 24s
Run test suite with Rust stable	8m 56s
Tests done	3s
	20m 19s

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