## What this PR does
Rephrase the descriptions for backup and restore variables
### Release note
```release-note
[docs] Add backup and restore instructions for PostgreSQL
```
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Documentation**
* Updated PostgreSQL backup restore instructions to use a YAML
configuration approach for bootstrapping from a backup, replacing
previous shell command examples.
* Clarified and restructured backup and recovery documentation,
including detailed configuration examples for enabling backups with
S3-compatible storage.
* Improved descriptions and default values for backup-related
configuration parameters for better clarity and consistency.
* **Chores**
* Incremented the PostgreSQL app chart version.
* Updated version mapping for the PostgreSQL package.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
cd packages/core/installer
make image-cozystack REGISTRY=YOUR_CUSTOM_REGISTRY
make apply
kubectl delete pod dashboard-redis-master-0 -n cozy-dashboard
kubectl delete po -l app=source-controller -n cozy-fluxcd