fix: lint fix 'appTitle' is never reassigned. Use 'const' instead

Co-authored-by: kcheriyath <kamal.cheriyath@mnscorp.net>
Co-authored-by: aswathysen <aswathy.sen@mnscorp.net>
Signed-off-by: skgandikota <gsaikoushik@yahoo.com>

plugins/techdocs-module-addons-contrib/src/ReportIssue/hooks.ts

@@ -78,7 +78,7 @@ export const useGitTemplate = (debounceTime?: number) => {
   const url = (editLink as HTMLAnchorElement)?.href ?? '';
   const scmIntegrationsApi = useApi(scmIntegrationsApiRef);
   const configApi = useApi(configApiRef);
-  let appTitle: string = configApi.getOptional('app.title') || 'Backstage';
+  const appTitle = configApi.getOptionalString('app.title') || 'Backstage';
   if (!selection || !url) return initialTemplate;
 
   const type = scmIntegrationsApi.byUrl(url)?.type;