Update name of "UltiBlox-DisplayValueNull"

Author: per1234

registry.txt

@@ -7575,7 +7575,7 @@ https://github.com/dejwk/roo_time_ds3231.git|Contributed|roo_time_ds3231
 https://github.com/SequentMicrosystems/Sequent-16relays-Library.git|Contributed|SM_16RELAYS
 https://github.com/canusorn/CynoIOT.git|Contributed|CynoIOT
 https://github.com/biomurph/GrayCode.git|Contributed|GrayCode
-https://github.com/UltiBlox/DisplayValueNull.git|Contributed|UltiBlox DisplayValueNull
+https://github.com/UltiBlox/DisplayValueNull.git|Contributed|UltiBlox-DisplayValueNull
 https://github.com/VanSilver/LCD595.git|Contributed|LCD595
 https://github.com/gi0rg0sPapamichail/YDLiDaR_GS2.git|Contributed|YDLidar
 https://github.com/RobTillaart/AD8495.git|Contributed|AD8495