Ensure ha-dialog uses correct <a> color

[spacegaier]

Breaking change

Proposed change

Previously hyperlinks in a ha-dialog were not styled properly and therefore used the browsers default coloring (dark blue in my case). This e.g. occurred in the entity persistent_notification.python_version that appears if python version 3.7 is used.

Now, correctly the primary theme color is used, same as for all other links.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

[SeanPM5]

This fixes #7211