Set icon width of hassio content card to prevent content shift of title/description

[niklaswa]

Proposed change

Just a small fix to prevent the content shift of the addon title and description when the icon loads.
Setting the width to 40 tells the HTML DOM that there will be an image and keep the space until the icon is loaded.
We can hardcode the width because it's also hardcoded in the CSS. I didn't set the height as there can be icons that have different aspect ratios (to prevent distortion).

Content shift I'm speaking of:

Screen.Recording.2025-03-15.at.12.05.27.mov

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

Additional information

⚠️ Unfortunately I couldn't test it as I have setup the frontend to connect to my production instance and I couldn't get the hassio/addon settings to load!
But it's such a small change, it shouldn't produce any problems. But I would be glad if someone who has the correct dev stup could test it...

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