fix: getOptionalString for app.support.items[].links[].title

Signed-off-by: Carl-Erik Bergström <cbergstrom@spotify.com>

.changeset/brown-queens-lick.md

@@ -0,0 +1,5 @@
+---
+'@backstage/core-components': patch
+---
+
+Use getOptionalString for optional app.support.items[].links[].title

packages/core-components/src/hooks/useSupportConfig.ts

@@ -72,7 +72,7 @@ export function useSupportConfig(): SupportConfig {
       links: (itemConf.getOptionalConfigArray('links') ?? []).flatMap(
         linkConf => ({
           url: linkConf.getString('url'),
-          title: linkConf.getString('title'),
+          title: linkConf.getOptionalString('title') ?? '',
         }),
       ),
     })),