gimp: Disable update check on startup

By default, GIMP checks for updates. Currently, this does not work (in our
environment) resulting in the error below [1].

    $ gimp
    gimp_check_updates_callback: loading of https://gimp.org/gimp_versions.json failed: Peer failed to perform TLS handshake

So, configure the build to disable the check.

    --disable-check-update  GIMP will not look up new version availability on startup

[1]: https://gitlab.gnome.org/GNOME/gimp/-/issues/5622

gimp.be0

@@ -25,6 +25,7 @@ SRCURL[0]="https://download.gimp.org/mirror/pub/gimp/v${PKGVERSION[2]}/gimp-${PK
 
 mee_configure() {
     bee_configure \
+        --disable-check-update \
         --disable-python
 }