Fixes report

Signed-off-by: Charles de Dreuille <charles.dedreuille@gmail.com>

.changeset/fifty-ads-dance.md

@@ -0,0 +1,5 @@
+---
+'@backstage/ui': patch
+---
+
+Fixes a couple of small bugs in BUI including setting H1 and H2 correctly on the Header and HeaderPage.

packages/ui/report.api.md

@@ -322,7 +322,7 @@ export const componentDefinitions: {
     };
     readonly dataAttributes: {
       readonly size: readonly ['small', 'medium', 'large'];
-      readonly variant: readonly ['primary', 'secondary', 'ghost'];
+      readonly variant: readonly ['primary', 'secondary', 'tertiary'];
     };
   };
   readonly ButtonIcon: {