[pygobject] docs/dev_environ: fix g-i package name for openSUSE. Fixes #274

[Christoph Reiter <creiter src gnome org>]

commit d9b58cdad053f1a735c9f01da444a8a10a4ac68f
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Thu Nov 8 16:59:12 2018 +0100

    docs/dev_environ: fix g-i package name for openSUSE. Fixes #274

 docs/devguide/dev_environ.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/docs/devguide/dev_environ.rst b/docs/devguide/dev_environ.rst
index db316784..ff848571 100644
--- a/docs/devguide/dev_environ.rst
+++ b/docs/devguide/dev_environ.rst
@@ -72,7 +72,7 @@ your operating system.
 
 .. code:: console
 
-    sudo zypper install -y python3-venv python3-wheel gobject-introspection \
+    sudo zypper install -y python3-venv python3-wheel gobject-introspection-devel \
       python3-cairo-devel openssl zlib git
     sudo zypper install --type pattern devel_basis