Bump ldap slapd and crond docker images to 2.1.16

[jenkins-infra-updatecli]

Bump `ldap` docker image digest and helm chart version

Update ldap (slapd) image in helm chart values

change detected: * key "$.image.slapd.tag" updated from "2.1.15" to "2.1.16", in file "charts/ldap/values.yaml" change detected: * key "$.version" updated from "4.2.8" to "4.2.9", in file "charts/ldap/Chart.yaml"

2.1.16

<!-- Optional: add a release summary here -->
## 📦 Dependency updates

* Use release drafter 7.0.0 (#63) @MarkEWaite

2.1.15

<!-- Optional: add a release summary here -->
## 📦 Dependency updates

* chore(deps): bump release-drafter/release-drafter from 6.1.0 to 6.1.1 (#61) @[dependabot[bot]](https://github.com/apps/dependabot)

Update ldap (crond) helm chart

change detected: * key "$.image.crond.tag" updated from "cron-2.1.15" to "cron-2.1.16", in file "charts/ldap/values.yaml"

2.1.16

<!-- Optional: add a release summary here -->
## 📦 Dependency updates

* Use release drafter 7.0.0 (#63) @MarkEWaite

Jenkins pipeline link

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