fix(Modal): adjust modal grid columns (#8320)

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: tw15egan

packages/components/src/components/modal/_modal.scss

@@ -71,7 +71,7 @@
     top: 0;
     display: grid;
     grid-template-rows: auto 1fr auto;
-    grid-template-columns: auto;
+    grid-template-columns: 100%;
     width: 100%;
     height: 100%;
     max-height: 100%;