chore(deps): update helm release mariadb to v18.2.6

This MR contains the following updates:

Package	Type	Update	Change
mariadb (source)	HelmChart	minor	18.1.0 -> 18.2.6

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Release Notes

bitnami/charts (mariadb)

v18.2.6

• [bitnami/mariadb] Release 18.2.6 (#​27638)

v18.2.5

• [bitnami/*] Update README changing TAC wording (#​27530) (52dfed6), closes #​27530
• [bitnami/mariadb] Release 18.2.5 (#​27619) (41836cc), closes #​27619

v18.2.4

• [bitnami/mariadb] Release 18.2.4 (#​27375) (fcac2b3), closes #​27375

v18.2.3

• [bitnami/mariadb] Release 18.2.3 (#​27243) (605363c), closes #​27243

v18.2.2

• [bitnami/mariadb] Release 18.2.2 (#​26977) (e79cf8c), closes #​26977

v18.2.1

• [bitnami/mariadb] Bump chart version (#​26644) (1cf51a6), closes #​26644

v18.2.0

• [bitnami/mariadb] PDB review (#​25978) (d8286f1), closes #​25978

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