fix: HTML5 tech with audio tag shouldn't use requestVideoFrameCallback

[mister-ben]

Description

The check for requestAnimationFrameCallback assumes a video element, which breaks track updates if an audio el is used.

Specific Changes proposed

Additional check in htmlt tech constructor.

Fixes #7772

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Change has been verified in an actual browser (Chrome, Firefox, IE)
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
• Reviewed by Two Core Contributors

[codecov]

Codecov Report

Merging #7778 (655ca98) into main (50ffd57) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #7778   +/-   ##
=======================================
  Coverage   80.92%   80.93%           
=======================================
  Files         116      116           
  Lines        7461     7462    +1     
  Branches     1811     1812    +1     
=======================================
+ Hits         6038     6039    +1     
  Misses       1423     1423           

Impacted Files	Coverage Δ
src/js/tech/html5.js	67.29% <100.00%> (+0.06%)	⬆️

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