[gimp-web] gimp_versions.json: add GIMP 2.10.20 source file

[Michael Schumacher <schumaml src gnome org>]

commit 24a5d5cf31074513184faaaeaaedbf77978edf8f
Author: Michael Schumacher <schumaml gmx de>
Date:   Mon Jun 8 01:11:51 2020 +0200

    gimp_versions.json: add GIMP 2.10.20 source file

 content/gimp_versions.json | 11 +++++++++++
 1 file changed, 11 insertions(+)
---
diff --git a/content/gimp_versions.json b/content/gimp_versions.json
index beb2eb41..82e108d6 100644
--- a/content/gimp_versions.json
+++ b/content/gimp_versions.json
@@ -1,5 +1,16 @@
 {
     "STABLE":  [
+        {
+            "version": "2.10.20",
+            "date": "2020-06-07",
+            "source": [
+                {
+                    "filename": "gimp-2.10.20.tar.bz2",
+                    "sha512": 
"7cd0b1833af87a167fdfee59fb491a72727fe3071c21c0de1813adb0f8272a92473e1e300517395b1b4593c8cb6781ee30f7a63966756e5a7f523a164308aba6",
+                    "sha256": "e12f9f874b1a007c4277b60aa81e0b67330be7e6153e5749ead839b902fc7b3c"
+                }
+            ]
+        },
         {
             "version": "2.10.18",
             "date": "2020-02-23",