[sysprof] update README.md

[Christian Hergert <chergert src gnome org>]

commit 47fa3d1d17607cb914a6681cf7809e912986467f
Author: Christian Hergert <chergert redhat com>
Date:   Fri Apr 1 16:54:59 2022 -0700

    update README.md
    
    Update build instructions for GTK 4

 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/README.md b/README.md
index 16e02dcc..abe08763 100644
--- a/README.md
+++ b/README.md
@@ -24,9 +24,9 @@ Building Sysprof
 ----------------
 
 You need some packages installed. The package names may vary depending on your
-distribution, the following command works on Fedora 25:
+distribution, the following command works on Fedora 36:
 
-    sudo dnf install gcc gcc-c++ ninja-build gtk3-devel
+    sudo dnf install gcc gcc-c++ ninja-build gtk4-devel libadwaita-devel
 
 Then do the following: