fix(em): fix wording (#5757)

* fix(em): fix wording

* Update concepts.mdx

* Apply suggestions from code review

Co-authored-by: Océane <[email protected]>

* fix(ins): fix wording

---------

Co-authored-by: Océane <[email protected]>

Author: bene2k1

pages/elastic-metal/concepts.mdx

@@ -16,13 +16,13 @@ When an Elastic Metal server is launched, `cloud-init` reads user-provided confi
 
 ### Cloud-init user-data
 
-User-data is the mechanism through which configuration instructions are passed to an Instance. When cloud-init detects user-data during boot, it interprets and executes it based on the data format provided.
+User-data is the mechanism through which configuration instructions are passed to an Elastic Metal server. When cloud-init detects user-data during boot, it interprets and executes it according to the format provided.
 The following formats are supported:
 
 | Format                      | Starts with       | Description                                                      |
 | --------------------------- | ----------------- | ---------------------------------------------------------------- |
 | **Cloud config file**       | `#cloud-config`   | YAML file containing cloud-init configuration directives.        |
-| **Shell script**            | `#!`              | Shell script executed during the first boot of the Instance.     |
+| **Shell script**            | `#!`              | Shell script executed during the first boot of the server.     |
 | **Include file**            | `#include`        | File listing URLs whose contents will be fetched and executed.   |
 | **Gzip compressed content** | N/A               | Gzip-compressed user-data that is decompressed and executed.     |
 | **MIME multipart archive**  | N/A               | File combining multiple data types (e.g. cloud-config + script). |
@@ -80,4 +80,4 @@ After disabling rescue mode, you have to reboot your server.
 
 ## Tags
 
-Tags allow you to organize your resources by sorting and filtering your cloud assets in any organizational pattern you choose. This helps you arrange, control, and monitor your cloud resources. You can assign as many tags as you want to each Scaleway product.
+Tags allow you to organize your resources by sorting and filtering your cloud assets in any organizational pattern you choose. This helps you arrange, control, and monitor your cloud resources. You can assign as many tags as you want to each Scaleway product.