Fix broken build

src/data/roadmaps/mongodb/content/110-mongodb-security/encryption/100-encryption-at-rest.md

@@ -31,7 +31,8 @@ To enable encryption at rest in MongoDB, you have to perform the following steps
 - **Enable encryption**: Turn on the `encryptWith` parameter in the WiredTiger storage engine.
 
 Example `mongod.conf` file:
-```yml
+
+```yaml
 storage:
   wiredTiger:
     engineConfig:

src/lib/roadmap-topic.ts

@@ -46,7 +46,8 @@ function generateBreadcrumbs(topicUrl: string, topicFiles: Record<string, Roadma
 
   const breadcrumbs = breadcrumbUrls.map((breadCrumbUrl): BreadcrumbItem => {
     const topicFile = topicFiles[breadCrumbUrl];
-    const topicFileContent = topicFile.file;
+
+    const topicFileContent = topicFile?.file;
 
     const firstHeading = topicFileContent?.getHeadings()?.[0];