Update laptop-battery-thresholds.md

Remove the trailing space

Author: thomas-zimmerman

content/laptop-battery-thresholds.md

@@ -75,7 +75,7 @@ The thresholds can be controlled by reading from and writing to these sysfs file
 ### At boot
 
 The current version of open firmware should persist the threshold values in flash.
-If changes to your system's charge thresholds do not persist across reboots, 
+If changes to your system's charge thresholds do not persist across reboots,
 you should update your firmware.
 <!-- https://github.com/system76/ec/pull/498 merged Nov 26, 2024 -->
 If you cannot update your firmware, you can use the instructions below as a workaround.