Fix unreadable counter digit on not-yet-reached steps (#3023)

.changeset/fix-inactive-steps-counter-contrast.md

@@ -0,0 +1,5 @@
+---
+"@tabler/core": patch
+---
+
+Fixed unreadable counter digit on not-yet-reached steps by giving `.step-item` `::before` the `--tblr-disabled-color`.

core/scss/ui/_steps.scss

@@ -105,6 +105,10 @@
       &::before {
         background: var(--steps-inactive-color);
       }
+
+      &::before {
+        color: var(--disabled-color);
+      }
     }
   }
 }