game entry file names changed to canonical version

games/easyrpg_player.md

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+# EasyRPG Player
+
+_EasyRPG Player is a program that allows to play games created with RPG Maker 2000 and 2003._
+
+- Home: https://easyrpg.org/player/, https://easyrpg.org/
+- State: mature
+- Download: https://easyrpg.org/player/downloads/
+- Keywords: framework
+- Code repository: https://github.com/EasyRPG/Player.git
+- Code language: C++
+- Code license: GPL-3.0
+
+## Building
+
+- Build system: Autoconf, CMake
+