correct version hint

Author: Kariton

CHANGELOG.md

@@ -7,7 +7,7 @@
 Now compatible only with Factorio V2.0.
 The Space Age DLC is not required to use this Helm chart.
 Some Factorio settings in general have changed.
-To continue using older 'factoriotools/factorio' Docker images, use version V1.2.0.
+To continue using older 'factoriotools/factorio' Docker images, use version V1.2.5.
 
 - Updated fields in values.yaml for Factorio V2.0 and Space Age DLC.