Adding release notes for 170.3.79-preview

[llali]

Description

Please provide a detailed description. Be as descriptive as possible - include information about what is being changed,
why it's being changed, and any links to relevant issues. If this is closing an existing issue use one of the issue linking keywords to link the issue to this PR and have it automatically close when completed.

In addition, go through the checklist below and check each item as you validate it is either handled or not applicable to this change.

Code Changes

• Unit tests are added, if possible
• Existing tests are passing
• New or updated code follows the guidelines here
• Ensure .dacpac from changes to Microsoft.Build.Sql build process MUST be backwards compatible with older versions of SqlPackage
• Use proper logging for MSBuild tasks

[dzsquared]

I thought netstandard was in 170.3.63-preview, but its fine here as well

[llali]

I thought netstandard was in 170.3.63-preview, but its fine here as well

you are right. removed