bugFix:(IconButton) Set the min-width of IconButton to unset (#5078)

* Set the min-width of IconButton to unset

* Create dull-beans-dance.md

Author: jonrohan

.changeset/dull-beans-dance.md

@@ -0,0 +1,5 @@
+---
+"@primer/react": patch
+---
+
+Set the `min-width` of `IconButton` to `unset` to resolve layout issues.

packages/react/src/Button/ButtonBase.module.css

@@ -71,7 +71,7 @@
   &:where(.IconButton) {
     display: inline-grid;
     width: var(--control-medium-size);
-    min-width: var(--control-medium-size);
+    min-width: unset;
     /* stylelint-disable-next-line primer/spacing */
     padding: unset;
     place-content: center;