fixing Document title

Reviewed-by: vladimirvshivkov <vshivkovvladimir@gmail.com>
Co-authored-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-committed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>

otc_metadata/data/services.yaml

@@ -610,7 +610,7 @@ documents:
     pdf_name: fg-dev-guide
     rst_location: dev_guide/source
     service_type: fg
-    title: Developer's Guide
+    title: Developer Guide
     type: dev
   - environment: internal
     html_location: docs/fg/umn