fix(srv): add missing env var for jobs x cli tuto MTA-6305 (#5320)

Author: SamyOubouaziz

tutorials/power-on-off-instances-jobs/index.mdx

@@ -45,10 +45,11 @@ Serverless Jobs are perfectly adapted for these autonomous tasks, as we do not n
     - `SCW_SECRET_KEY`: your API secret key.
     - `SCW_DEFAULT_PROJECT_ID`: your Project ID.
     - `SCW_DEFAULT_ORGANIZATION_ID`: your Organization ID.
-    - `SCW_DEFAULT_REGION`: the preferred region.
+    - `SCW_DEFAULT_REGION`: the desired region.
+    - `SCW_DEFAULT_ZONE`: the desired availability zone.
 
 <Message type="note">
-    We recommend using Secret Manager to store the `SCW_ACCESS_KEY` and `SCW_SECRET_KEY`.
+    We recommend using [Secret Manager](/secret-manager/) to store the `SCW_ACCESS_KEY` and `SCW_SECRET_KEY`.
 </Message>
 
     For more details about variables used by `cli`, refer to the [CLI config documentation](https://cli.scaleway.com/instance/#power-on-server).

tutorials/snapshot-instances-jobs/index.mdx

@@ -42,10 +42,11 @@ Serverless Jobs are perfectly adapted for these autonomous tasks, as we do not n
     - `SCW_SECRET_KEY`: your API secret key.
     - `SCW_DEFAULT_PROJECT_ID`: your Project ID.
     - `SCW_DEFAULT_ORGANIZATION_ID`: your Organization ID.
-    - `SCW_DEFAULT_REGION`: concerned region.
+    - `SCW_DEFAULT_REGION`: the desired region.
+    - `SCW_DEFAULT_ZONE`: the desired availability zone.
 
     <Message type="note">
-        We recommend using Secret Manager to store the `SCW_ACCESS_KEY` and `SCW_SECRET_KEY`.
+        We recommend using [Secret Manager](/secret-manager/) to store the `SCW_ACCESS_KEY` and `SCW_SECRET_KEY`.
     </Message>
 
     For more details about variables used by `cli`, refer to the [CLI config documentation](https://github.com/scaleway/scaleway-cli/blob/master/docs/commands/config.md).