fix(charts): update helm release memcached to v7.4.9

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
memcached (source)	patch	7.4.8 -> 7.4.9

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Release Notes

bitnami/charts (memcached)

### [`v7.4.9`](https://togithub.com/bitnami/charts/blob/HEAD/bitnami/memcached/CHANGELOG.md#749-2024-07-16) - \[bitnami/memcached] Global StorageClass as default value ([#​28055](https://togithub.com/bitnami/charts/pull/28055))

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