cleanly handle no update, don't try to push

proton-checker.py

@@ -72,12 +72,22 @@ if __name__ == "__main__":
     print(f"  {country_code}: {count}")
 
 # Git commands
-  try:
+try:
     subprocess.run(["git", "add", output_file], check=True)
-    subprocess.run(["git", "commit", "-m", "Update ProtonVPN IP ranges"], check=True)
+    
+    # Attempt to commit, but allow for no changes
+    commit_result = subprocess.run(["git", "commit", "-m", "Update ProtonVPN IP ranges"], check=False) 
+    
+    if commit_result.returncode == 0:
+        # Commit was successful (changes were made)
         subprocess.run(["git", "push", "origin"], check=True)
         print("Changes pushed to git repository.")
-  except subprocess.CalledProcessError as e:
+    else:
+        # No changes to commit
+        print("No changes to ProtonVPN IP ranges.") 
+
+except subprocess.CalledProcessError as e:
+    # Handle other git errors
     print(f"Error running git commands: {e}") 
 
 # ping health system