You didn't forget when you posted your example.
Agreed, quoting the value strings in tags is good practice, and keeps one's code out of trouble.
But as a practical matter, as long as no special characters are in the value string (quote marks, closing brackets, etc.) to change the meaning when parsed, all browsers will accept an unquoted string. A huge amount of modern production HTML uses unquoted tag values, yet "works" just fine, as a result.
Even the official HTML Validator doesn't care about quoting tag values. :-)
You didn't forget when you posted your example."
They're not necessary. After the quoted URL for the image you can just use a space between height, width and other arguments. Take the example below, delete the leading space and preview it.
That's what I did when I posted it. Maybe FR autocorrects but I take out the leading space and preview it, it works fine. Quotes don't hurt.
Try it and let me know.
Note: I added a height parameter to show both attributes obviously operating. Normally you just skip the height parameter as its automatically computed for correct aspect ratio.
Just cut and paste the test post below, delete leading space and preview it:
Test: < img src="https://babylonbee.com/img/articles/article-4655-1.jpg" width=200 Height=25>
Without:
Test: