Update apps/website/content/obsidian/use-cases/build-utilize-personal-knowledge-base.mdx

Co-authored-by: graphite-app[bot] <96075541+graphite-app[bot]@users.noreply.github.com>

Author: KarolaKirsanow

apps/website/content/obsidian/use-cases/build-utilize-personal-knowledge-base.mdx

@@ -32,7 +32,7 @@ For Obsidian (& Roam), the answer is **yes**. Your discourse nodes can coexist w
 
 ### Vault organization
 
-If you are a **"folder-centric"** Obsidian user, we recommend keeping your discourse graph an folder within your vault.
+If you are a **"folder-centric"** Obsidian user, we recommend keeping your discourse graph a folder within your vault.
 
 <Image
   src="/docs/obsidian/left-sidebar.png"