remove negative margin left for breadcrumb items and add padding left to the slash after it

Author: bsatarnejad

app/components/primer/beta/breadcrumbs.pcss

@@ -1,7 +1,5 @@
 .breadcrumb-item {
   display: inline-block;
-  /* stylelint-disable-next-line primer/spacing */
-  margin-left: -0.35em;
   list-style: none;
   max-width: 100%;
 
@@ -10,15 +8,12 @@
     height: 0.8em;
     /* stylelint-disable-next-line primer/spacing */
     margin: 0 0.5em;
+    padding-left: 0.35em;
     content: '';
     /* stylelint-disable-next-line primer/borders */
     border-right: 0.1em solid var(--borderColor-neutral-emphasis);
     transform: rotate(15deg) translateY(0.0625em);
   }
-
-  &:first-child {
-    margin-left: 0;
-  }
 }
 
 .breadcrumb-item-selected,