fix typo

Author: jantje

io.sloeber.ui/OSGI-INF/l10n/bundle.properties

@@ -61,7 +61,7 @@ command.program.label = Upload the sketch using the selected programmer.
 command.program.description = Upload selected project to your board using the programmer selected in the project arduino properties
 command.program.tooltip = Use this button to program your selected project to your hardware.
 command.burnBootloader.label = Burn the bootloader to your board.
-command.burnBootloader.description = urn the bootloader to your board using the programmer selected in the project arduino properties
+command.burnBootloader.description = Burn the bootloader to your board using the programmer selected in the project arduino properties
 command.burnBootloader.tooltip = Use this button to burn a bootloader to your hardware.
 command.reattachLibraries.description = Ask Sloeber to reattach all imported libraries to try to fix stuff.
 command.reattachLibraries.name = Reattach Libraries