fix(clipboard-copy): copy button height (#2761)

Fixes #2741

Author: bennypowers

.changeset/upset-birds-mix.md

@@ -0,0 +1,4 @@
+---
+"@patternfly/elements": patch
+---
+`<pf-clipboard-copy>`: corrected size of copy button

elements/pf-clipboard-copy/pf-clipboard-copy.css

@@ -128,6 +128,10 @@ textarea {
   height: 100%;
 }
 
+#copy-button {
+  height: calc(100% - var(--pf-c-button--PaddingTop) - var(--pf-c-button--PaddingBottom));
+}
+
 .container:is(.compact, .inline) #input-group {
   display: contents;
 }