use relative unit for line-height to avoid a fixed line-height being inherited and then be wrong for an element that didn't define own line-height

app/shared/db/tree.server.ts

@@ -34,8 +34,8 @@ export const createRootInstance = (breakpoints: Array<Breakpoint>) => {
           },
           lineHeight: {
             type: "unit",
-            unit: "px",
-            value: 20,
+            unit: "number",
+            value: 1.5,
           },
           color: {
             type: "keyword",