chore(deps): update helm release common to v2.21.0

[renovate]

This PR contains the following updates:

Package	Update	Change
common (source)	minor	2.20.2 -> 2.21.0

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Release Notes

bitnami/charts (common)

v2.21.0

• [bitnami/common] Allow handling of new secrets after initial installation (#​28581)

v2.20.5

• [bitnami/common] [bitnami/wordpress] Use global.storageClass for fallback, not override (#​24863)

v2.20.4

• [bitnami/*] Update README changing TAC wording (#​27530) (52dfed6), closes #​27530
• [bitnami/common] Increase ephemeral-storage default limits (#​27902) (dc0000d), closes #​27902

v2.20.3

• [bitnami/common] chore: 🔧 Relax large and xlarge presets resource requests (#​27312) (6ca69f6), closes #​27312

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