Table and Figure captions need proper tag

[jonfroehlich]

They are too large here.

https://makeabilitylab.github.io/physcomp/arduino/led-on.html

[jonfroehlich]

Right now, we tend to use {: .fs-1} for video and figure captions but we should switch these out entirely to a custom tag like captions

<video autoplay loop muted playsinline style="margin:0px">
  <source src="assets/videos/FSR-TopDown9VCircuit-IMG_5683_Trimmed-Optimized.mp4" type="video/mp4" />
</video>
**Video.** A video demonstration of a force-sensitive resistor (aka a "pressure sensor") that varies its resistance in proportion to an applied force. This is just one of the many things you will learn about and build in this "Intro to Electronics" tutorial series. See more in [L8: Variable Resistors](variable-resistors.md).
{: .fs-1 }