message: style(protocol-designer): adjust font styling on slot warning text
  * style(protocol-designer): adjust font styling on slot warning text
  closes
  * use variable for line height
diff: .warning_text {
  padding: 1.3rem 0.5rem 0 0.5rem;
  - font-size: var(--fs-caption);
  - font-weight: var(--fw-regular);
  + font-size: 0.52rem;
  + font-weight: var(--fw-semibold);
  color: var(--c-med-gray);
  + line-height: var(--lh-title);
  }
  