fix: feedback

Signed-off-by: Remi Kristelijn <remi.kristelijn@theapsgroup.com>

.changeset/thirty-owls-lay.md

@@ -1,6 +1,5 @@
 ---
 '@backstage/core': patch
-'storybook': patch
 ---
 
-exposes undocumented PageTheme
+# exposes undocumented `PageTheme`

docs/getting-started/app-custom-theme.md

@@ -131,11 +131,7 @@ const themeOptions = createThemeOptions({
     library: genPageTheme(['#123456','#123456'] shapes.wave),
     other: genPageTheme(['#123456','#123456'], shapes.wave),
     app: genPageTheme(['#123456','#123456'], shapes.wave),
-    apis: genPageTheme(['#123456','#123456'], shapes.wave),
-    grpc: genPageTheme(['#123456','#123456'], shapes.wave2),
-    asyncapi: genPageTheme(['#123456','#123456'], shapes.wave2),
-    graphql: genPageTheme(['#123456','#123456'], shapes.wave2),
-    openapi: genPageTheme(['#123456','#123456'], shapes.wave2),
+    apis: genPageTheme(['#123456','#123456'],
   },
 });
 ```