fix: Text color

Author: Jasenkoo

src/Vue3DatePicker/style/components/_Calendar.scss

@@ -36,6 +36,7 @@
     text-align: center;
     flex-grow: 1;
     box-sizing: border-box;
+    color: var(--dp-text-color);
 }
 
 .dp__calendar {
@@ -50,10 +51,6 @@
     position: relative;
 }
 
-.dp__calendar_days {
-    color: var(--dp-text-color);
-}
-
 .dp__calendar_header_cell {
     border-bottom: thin solid var(--dp-border-color);
     padding: 0.5rem;