feat: Add support for side containers to HA chart (#1464)

Co-authored-by: Matea Pesic <80577904+matea16@users.noreply.github.com>

Author: as51340

pages/getting-started/install-memgraph/kubernetes.mdx

@@ -290,6 +290,8 @@ their default values.
 | `extraVolumes`                                | Optionally specify extra list of additional volumes                                                                              | `[]`                                   |
 | `extraVolumeMounts`                           | Optionally specify extra list of additional volumeMounts                                                                         | `[]`                                   |
 | `extraEnv`                                    | Env variables that users can define                                                                                              | `[]`                                   |
+| `userContainers.data`                         | Containers that users can specifiy that will be run aside from the main Memgraph container on data instances.                    | `[]`                                   |
+| `userContainers.coordinators`                 | Containers that users can specifiy that will be run aside from the main Memgraph container on coordinators.                      | `[]`                                   |
 
 To change the default chart values, provide your own `values.yaml` file during
 the installation: