The Line-height value can be set as a unitlesse number like 1.2 rem, 12px or 120%. You can try test on your code and adjust it as you wish:
.text-body {
font-size: 1.5rem;
letter-spacing: 0.06rem;
line-height: 12px !important; /* Adjust this value as needed */
font-family: var(–font-body-family);
font-style: var(–font-body-style);
font-weight: var(–font-body-weight);
}
I hope it helps.
Esther