fix: Update pyenv manager version detection to use pyenv.bat on Windows

Author: karthiknadig

crates/pet-pyenv/tests/pyenv_test.rs

@@ -51,7 +51,7 @@ fn gets_pyenv_manager_version_without_env_vars() {
             ".pyenv",
             "pyenv-win",
             "bin",
-            "pyenv.exe",
+            "pyenv.bat",
         ]),
         version: Some("3.5.0".to_string()),
         tool: EnvManagerType::Pyenv,