chore: v4.0 -> v4.0.0

The version variable inside the script should always be major.minor.patch
major.minor releases are reserved for native packages and tags/releases

Co-authored-by: port19 <port19@port19.xyz>
Co-authored-by: Derisis13 <email.felhasznalasra@gmail.com>
Co-authored-by: CoolnsX <ansari.tan20@gmail.com>
Co-authored-by: chokerman <44473782+justchokingaround@users.noreply.github.com>
Co-authored-by: zenith71 <71zenith@protonmail.com>

ani-cli

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-version_number="4.0"
+version_number="4.0.0"
 
 # UI