What’s HP in "Bitcoin Core – HP"?

Simply observed once I run Bitcoin Core, the title bar says "Bitcoin Core – HP". What does HP imply?

• Bitcoin Core model v27.0.0
• macOS Sonoma 14.5 (23F79)

bitcoin.conf:

server=1  
dbcache=4000 
prune=2000 
datacarriersize=0 
mempoolfullrbf=1