[gimp-web] content: forgot to add the 2.99.12 macOS package to the json file!

[Jehan <jehanp src gnome org>]

commit de74465501bd21850c82fcc6959b180f4b94ea0a
Author: Jehan <jehan girinstud io>
Date:   Sat Aug 27 17:25:43 2022 +0200

    content: forgot to add the 2.99.12 macOS package to the json file!

 content/gimp_versions.json | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/content/gimp_versions.json b/content/gimp_versions.json
index 12556336..8a1ccb2e 100644
--- a/content/gimp_versions.json
+++ b/content/gimp_versions.json
@@ -645,6 +645,16 @@
                     "min-support": "Windows 7",
                     "build-id": "org.gimp.GIMP_official"
                 }
+            ],
+            "macos": [
+                {
+                    "date": "2022-02-24",
+                    "filename": "gimp-2.99.12-x86_64.dmg",
+                    "sha512": 
"0b86d866af764d4bcc0ba1bf9e25af2ee5733b5e978bfa4f2674024fe7da79f58629712b7d3e87f0fab84cc56c8dc8c00ef58232bc44fa9a3f6eb7b9d8a2ffb0",
+                    "sha256": "5c6f2e1ec98e8fa9d78af86e1c5e0e47ce0453d49402b666abbbdf020750f6a9",
+                    "min-support": "macOS 10.12 Sierra",
+                    "build-id": "org.gimp.GIMP_official"
+                }
             ]
         },
         {