Use f-string for version string formatting

Author: arnobaer

setup.py

@@ -36,7 +36,7 @@ def create_swig_wrapper(self):
     def create_version_module(self):
         with open(os.path.join(PACKAGE_DIR, "_version.py"), "w") as f:
             f.write("# This file was auto generated by `setup.py`, changes might be lost.\n")
-            f.write("__version__ = \"{UTM_VERSION}\"\n")
+            f.write(f"__version__ = \"{UTM_VERSION}\"\n")
 
     def run(self):
         self.create_swig_wrapper()