${SHORT_NET_NAME(pad_number)} not supported

We have ${NET_NAME(pad_number)}, but nothing for the short netname.

KiCad Version

Application: KiCad PCB Editor arm64 on arm64

Version: 7.99.0-1706-g4554da2a32-dirty, debug build

Libraries:
	wxWidgets 3.2.2
	FreeType 2.12.1
	HarfBuzz 5.3.1
	FontConfig 2.14.1
	libcurl/7.87.0 (SecureTransport) LibreSSL/3.3.6 zlib/1.2.11 nghttp2/1.45.1

Platform: macOS Monterey Version 12.6.6 (Build 21G646), 64 bit, Little endian, wxMac

Build Info:
	Date: Jul  2 2023 10:22:05
	wxWidgets: 3.2.2 (wchar_t,wx containers)
	Boost: 1.80.0
	OCC: 7.6.3
	Curl: 7.79.1
	ngspice: 38
	Compiler: Clang 13.1.6 with C++ ABI 1002

Build settings:
	KICAD_STDLIB_DEBUG=OFF
	KICAD_STDLIB_LIGHT_DEBUG=OFF
	KICAD_SANITIZE_ADDRESS=OFF
	KICAD_SANITIZE_THREADS=OFF