Updated the Deploy to Azure Gov button in Playbook and ReleaseNotes for Solution DNS Essentials

[v-utpalkumar (v-utpalkumar)]

Change(s):

• Updated the ReleaseNotes for Solution DNS Essentials.
• Fixed the broken Deploy to Azure Gov button in Playbook.

Reason for Change(s):

• The ReleaseNotes were not updated correctly and have now been updated to accurately reflect the changes.
• Deploy to Azure Gov button was not displaying correctly.

Version Updated:

• Not required

Testing Completed:

• Yes, verified the changes from the previous Pull Requests and validated the Solution DNS Essentials in the Content Hub.

Checked that the validations are passing and have addressed any issues that are present:

• Yes