fix(SelectPanel): use dvh units for full screen when available (#5930)

Author: francinelucca

.changeset/few-papayas-promise.md

@@ -0,0 +1,5 @@
+---
+"@primer/react": patch
+---
+
+fix(SelectPanel): use dvh units for full screen when available

packages/react/src/Overlay/Overlay.module.css

@@ -166,4 +166,11 @@
     margin: 0;
     border-radius: unset;
   }
+
+  @supports (height: 100dvh) {
+    /* fix for mobile safari (100vh clips the screen with the toolbar) */
+    &:where([data-variant='fullscreen']) {
+      height: 100dvh;
+    }
+  }
 }