Add upper-roman and upper-alpha list types (#2305)

* Add upper-roman and upper-alpha list types

* Create beige-files-move.md

Author: vdepizzol

.changeset/beige-files-move.md

@@ -0,0 +1,5 @@
+---
+"@primer/css": patch
+---
+
+Add upper-roman and upper-alpha list types

src/markdown/lists.scss

@@ -14,18 +14,26 @@
     }
   }
 
-  ol[type='1'] {
-    list-style-type: decimal;
-  }
-
   ol[type='a'] {
     list-style-type: lower-alpha;
   }
 
+  ol[type='A'] {
+    list-style-type: upper-alpha;
+  }
+
   ol[type='i'] {
     list-style-type: lower-roman;
   }
 
+  ol[type='I'] {
+    list-style-type: upper-roman;
+  }
+
+  ol[type='1'] {
+    list-style-type: decimal;
+  }
+
   // Reset <ol> style to decimal (HTML default) specifically for AsciiDoc
   // <div><ol> construction (doesn't affect MarkDown)
   div > ol:not([type]) {