[meld] Bump Meld version in meson build

[Kai Willadsen <kaiw src gnome org>]

commit 6b53493505406d13cde6512a6c9d979126961361
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Fri Jan 7 13:47:47 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 526a0575..d5b59c10 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project(
   'meld',
-  version: '3.21.0',
+  version: '3.21.1',
   meson_version: '>= 0.49.0',
 )