revert the requirment for pygame>=2.6.0

pyproject.toml

@@ -31,16 +31,16 @@ dynamic = ["version"]
 
 [project.optional-dependencies]
 # Update dependencies in `all` if any are added or removed
-atari = ["multi_agent_ale_py>=0.1.11", "pygame>=2.6.0"]
+atari = ["multi_agent_ale_py>=0.1.11", "pygame>=2.3.0"]
 classic = [
     "chess>=1.9.4",
     "rlcard>=1.0.5",
-    "pygame>=2.6.0",
+    "pygame>=2.3.0",
     "shimmy[openspiel]>=1.2.0"
 ]
-butterfly = ["pygame>=2.6.0", "pymunk>=6.2.0"]
-mpe = ["pygame>=2.6.0"]
-sisl = ["pygame>=2.6.0", "pymunk>=6.2.0", "box2d-py>=2.3.5", "scipy>=1.4.1"]
+butterfly = ["pygame>=2.3.0", "pymunk>=6.2.0"]
+mpe = ["pygame>=2.3.0"]
+sisl = ["pygame>=2.3.0", "pymunk>=6.2.0", "box2d-py>=2.3.5", "scipy>=1.4.1"]
 other = ["pillow>=8.0.1"]
 testing = [
     "pynput>=1.7.6",
@@ -53,7 +53,7 @@ testing = [
 ]
 all = [
     "multi_agent_ale_py>=0.1.11",
-    "pygame>=2.6.0",
+    "pygame>=2.3.0",
     "chess>=1.9.4",
     "rlcard>=1.0.5",
     "shimmy[openspiel]>=1.2.0",

tutorials/SB3/waterworld/requirements.txt

@@ -1,4 +1,3 @@
-pygame==2.6.0
 pettingzoo[sisl]>=1.24.0
 stable-baselines3>=2.0.0
 supersuit>=3.9.0