chore(charts/wvffle-vcluster): update helm release vcluster to v0.20.3

This MR contains the following updates:

Package	Update	Change
vcluster (source)	patch	0.20.2 -> 0.20.3

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Release Notes

loft-sh/vcluster (vcluster)

v0.20.3

Compare Source

Full Changelog: https://github.com/loft-sh/vcluster/compare/v0.20.2...v0.20.3

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