fix: --dp-border-radius applied to calendar cells instead of --dp-cell-border-radius (fixes #827)

Author: Jasenkoo

src/VueDatePicker/style/components/_Calendar.scss

@@ -158,17 +158,17 @@
 
 .dp__cell_auto_range_start {
   @extend %__dp_range_border_radius_start;
-  border-start-start-radius: var(--dp-border-radius);
-  border-end-start-radius: var(--dp-border-radius);
+  border-start-start-radius: var(--dp-cell-border-radius);
+  border-end-start-radius: var(--dp-cell-border-radius);
   border-inline-start: 1px dashed var(--dp-primary-color);
   border-top: 1px dashed var(--dp-primary-color);
   border-bottom: 1px dashed var(--dp-primary-color);
 }
 
 .dp__cell_auto_range_end {
   @extend %__dp_range_border_radius_end;
-  border-start-end-radius: var(--dp-border-radius);
-  border-end-end-radius: var(--dp-border-radius);
+  border-start-end-radius: var(--dp-cell-border-radius);
+  border-end-end-radius: var(--dp-cell-border-radius);
   border-top: 1px dashed var(--dp-primary-color);
   border-bottom: 1px dashed var(--dp-primary-color);
   border-inline-end: 1px dashed var(--dp-primary-color);