Use minus sign for extra version info

Contributes to CURA-8640

cura/UI/CuraSplashScreen.py

@@ -76,7 +76,7 @@ class CuraSplashScreen(QSplashScreen):
         if len(version) == 1:
             painter.drawText(40, 104 + self._version_y_offset, round(330 * self._scale), round(230 * self._scale), Qt.AlignmentFlag.AlignLeft | Qt.AlignmentFlag.AlignTop, version[0] if not ApplicationMetadata.IsAlternateVersion else ApplicationMetadata.CuraBuildType)
         elif len(version) > 1:
-            painter.drawText(40, 104 + self._version_y_offset, round(330 * self._scale), round(230 * self._scale), Qt.AlignmentFlag.AlignLeft | Qt.AlignmentFlag.AlignTop, f"{version[0]}_{version[1]}" if not ApplicationMetadata.IsAlternateVersion else ApplicationMetadata.CuraBuildType)
+            painter.drawText(40, 104 + self._version_y_offset, round(330 * self._scale), round(230 * self._scale), Qt.AlignmentFlag.AlignLeft | Qt.AlignmentFlag.AlignTop, f"{version[0]}-{version[1]}" if not ApplicationMetadata.IsAlternateVersion else ApplicationMetadata.CuraBuildType)
 
         # Draw the loading image
         pen = QPen()