bump to 2.3.0-rc1 everywhere as listed in devnotes #178

Job	Run time
prepare	3s
Build with Pip (ubuntu-22.04, 3.8, llvm, -march=native)	1m 19s
Build with Pip (ubuntu-22.04, 3.8, llvm, -march=x86-64)	1m 47s
Build with Pip (ubuntu-22.04, 3.8, gcc, -march=native)	1m 12s
Build with Pip (ubuntu-22.04, 3.8, gcc, -march=x86-64)	1m 3s
Build with Pip (ubuntu-22.04, 3.11, llvm, -march=native)	1m 29s
Build with Pip (ubuntu-22.04, 3.11, llvm, -march=x86-64)	1m 14s
Build with Pip (ubuntu-22.04, 3.11, gcc, -march=native)	1m 18s
Build with Pip (ubuntu-22.04, 3.11, gcc, -march=x86-64)	1m 4s
Build with Pip (windows-2022, 3.8, msvc, /arch:AVX2)	40s
Build with Pip (windows-2022, 3.8, msvc, /arch:SSE2)	40s
Build with Pip (windows-2022, 3.8, llvm, /arch:AVX2)	1m 32s
Build with Pip (windows-2022, 3.8, llvm, /arch:SSE2)	1m 27s
Build with Pip (windows-2022, 3.11, msvc, /arch:AVX2)	34s
Build with Pip (windows-2022, 3.11, msvc, /arch:SSE2)	53s
Build with Pip (windows-2022, 3.11, llvm, /arch:AVX2)	1m 40s
Build with Pip (windows-2022, 3.11, llvm, /arch:SSE2)	1m 30s
Build with Pip (macos-13, 3.8, llvm, -march=native)	2m 27s
Build with Pip (macos-13, 3.8, llvm, -march=x86-64)	2m 45s
Build with Pip (macos-13, 3.8, gcc-14, -march=native)	49s
Build with Pip (macos-13, 3.8, gcc-14, -march=x86-64)	40s
Build with Pip (macos-13, 3.11, llvm, -march=native)	3m 15s
Build with Pip (macos-13, 3.11, llvm, -march=x86-64)	2m 22s
Build with Pip (macos-13, 3.11, gcc-14, -march=native)	47s
Build with Pip (macos-13, 3.11, gcc-14, -march=x86-64)	40s
	33m 10s

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