[meld] Bump Meld version in meson build

[Kai Willadsen <kaiw src gnome org>]

commit 98c190f01e2fcfc0cd0652f21102a71163b751f2
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Aug 14 08:55:26 2022 +1000

    Bump Meld version in meson build

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index eb414ad6..4ceca3b0 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project(
   'meld',
-  version: '3.21.2',
+  version: '3.21.3',
   meson_version: '>= 0.49.0',
 )