[rygel] examples: Fix a comment

[Jens Georg <jensgeorg src gnome org>]

commit 2f6d96391b0b3d5914ca2b1a95dfae08de34e1a5
Author: Jens Georg <mail jensge org>
Date:   Sun Jul 12 11:20:32 2020 +0200

    examples: Fix a comment

 examples/fullscreen-renderer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/examples/fullscreen-renderer.c b/examples/fullscreen-renderer.c
index adaca44c..317212ea 100644
--- a/examples/fullscreen-renderer.c
+++ b/examples/fullscreen-renderer.c
@@ -27,7 +27,7 @@
  * fullscreen.
  *
  * Usage:
- *   standalone-renderer [<network device>]
+ *   fullscreen-renderer [<network device>]
  *
  * If no network device is given on the commandline, the program falls back to
  * eth0.