fix: PRE_RELEASE variable (#470)

Signed-off-by: oliver könig <okoenig@nvidia.com>

Author: ko3n1g

nemo_run/package_info.py

@@ -19,10 +19,10 @@
 MINOR = Version(__version__).minor
 PATCH = Version(__version__).micro
 if pre := Version(__version__).pre:
-    PRE_RELEASE = "".join(map(str, pre))
+    _PRE_RELEASE = "".join(map(str, pre))
 else:
-    PRE_RELEASE = ""
-
+    _PRE_RELEASE = ""
+PRE_RELEASE = _PRE_RELEASE
 DEV = Version(__version__).dev
 
 __package_name__ = "nemo_run"