Fix and Clarify Bash Command for Microsoft Package Repository in Linux Installation Docs. (#43046)

* Fixed the document bug for linux-ubuntu.md file.

* Update docs/core/install/linux-ubuntu.md

Resolving comments.

Co-authored-by: Andy (Steve) De George <[email protected]>

---------

Co-authored-by: Adit Sheth <[email protected]>
Co-authored-by: Andy (Steve) De George <[email protected]>

Author: 3 people

docs/core/install/linux-ubuntu.md

@@ -208,8 +208,11 @@ rm packages-microsoft-prod.deb
 sudo apt update
 ```
 
-> [!TIP]
-> The previous script was written for Ubuntu and it might not work if you're using a derived distribution, such as Linux Mint. It's likely that the `$repo_version` variable won't be assigned the correct value, making the URI for the `wget` command invalid. This variable maps to the specific Ubuntu version you want to get packages for, such as 22.04 or 23.10.
+> [!TIP]  
+> The previous script was written for Ubuntu and might not work if you're using a derived distribution, such as Linux Mint. It's likely that the `$ID` and `$VERSION_ID` variables won't be assigned the correct values, making the URI for the `wget` command invalid. The `$ID` corresponds to the distribution (e.g., `ubuntu`), while `$VERSION_ID` maps to the specific version of Ubuntu you want to get packages for, such as 22.04 or 23.10.
+>
+> For example, on Ubuntu 22.04 `$ID` would be `ubuntu` and `$VERSION_ID` would be `22.04`. The URL would look like:  
+> `https://packages.microsoft.com/config/ubuntu/22.04/packages-microsoft-prod.deb`.  
 >
 > You can use a web browser and navigate to <https://packages.microsoft.com/config/ubuntu/> to see which versions of Ubuntu are available to use as the `$repo_version` value.