[gimp] libgimp: fix more gi-docgen "qualifier fragment".

[Jehan <jehanp src gnome org>]

commit cf84f0e7077f41ce336c9b28cd0879b5d624cde2
Author: Jehan <jehan girinstud io>
Date:   Fri Feb 18 13:50:30 2022 +0100

    libgimp: fix more gi-docgen "qualifier fragment".
    
    Now the warning is:
    
    WARNING: Invalid fragment for 'Gimp.Config': it should be struct
    It implements the [iface@Config] interface and therefore has all its
                      ^~~~~~~~~~~~~~
    
    This warning feels wrong as we use GimpConfig for the name of the
    interface, yet in the .gir file, I see `<record name="Config" …>` yet
    `<interface name="ConfigInterface" …>`.
    I suppose gi-docgen would want us to use [iface@ConfigInterface] if we
    want to link the interface. But looking at the gir file, all interesting
    interface methods are associated to the Config record. So let's just go
    with the [struct@Config] proposed by the warning.
    In any case, something feels wrong or broken here, but we need to fix
    this for the CI. I hope Niels can look at it at some point.

 libgimp/gimpprocedureconfig.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/libgimp/gimpprocedureconfig.c b/libgimp/gimpprocedureconfig.c
index d8235b785b..0f458b2293 100644
--- a/libgimp/gimpprocedureconfig.c
+++ b/libgimp/gimpprocedureconfig.c
@@ -39,7 +39,7 @@
  * procedure's arguments and auxiliary arguments in number, order and
  * type.
  *
- * It implements the [iface@Config] interface and therefore has all its
+ * It implements the [struct@Config] interface and therefore has all its
  * serialization and deserialization features.
  *
  * Since: 3.0