missing value for "font-size" at line 136 of header-site-branding.css

Problem/Motivation

/core/themes/olivero/css/components/header-site-branding.css at line 136:

@media (min-width: 75rem) {
  .site-branding__text {
        letter-spacing: 0.02em;
        font-size: rem;
        line-height: var(--sp2);
    
    }
}

there should be a numeric value in front of rem. the CSS is not valid.

Proposed resolution

add a value