[DLStreamer Pipeline Server] Update Page titles (open-edge-platform#633)

Co-authored-by: rohitkatakol <[email protected]>

Author: rrajore

microservices/dlstreamer-pipeline-server/docs/user-guide/index.rst

@@ -1,3 +1,7 @@
+DL Streamer Pipeline Server
+==============================
+
+
 .. toctree::
    :hidden: