i18n(de): update `plugins.mdx` #8914

Job	Run time
Docs site builds on Windows	1m 54s
changes	3s
Run type checks	39s
Check for accessibility issues	2m 47s
Check for broken links	1m 2s
Run unit tests	0s
Run E2E tests (${{ matrix.os }})	0s
	6m 25s

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