Update CHANGELOG

CHANGELOG

@@ -4,7 +4,7 @@ changelog
 Current Release:    raylib 4.2.0 (11 August 2022)
 
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-Release:     raylib 4.5 (xx February 2022?) -WIP-
+Release:     raylib 4.5 (xx February 2023) -WIP-
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 KEY CHANGES:
  - ADDED: M3D model format support with animations