README and CHANGELOG updates for making `develop` the default branch #14216

Job	Run time
Check code format	45s
Run SBOR integration tests	1m 58s
Run SBOR unit tests	1m 46s
Run Scrypto tests	5m 43s
Run Radix Engine Toolkit tests	4m 25s
Run Scrypto compiler tests	5m 41s
Run Scrypto derive tests	2m 57s
Run Scrypto examples	5m 40s
Run Radix Engine build (ubuntu-16-cores-selfhosted)	3m 13s
Run Radix Engine tests (release)	2m 35s
Run Radix Engine tests	1m 39s
Check Scrypto Stubs	5m 41s
Run Radix Engine common benchmarks	2m 55s
Run Radix Engine benchmarks	5m 42s
Run transaction tests	2m 53s
Run Radix Engine tests (no_std)	1m 34s
Run cargo check (ubuntu-16-cores-selfhosted)	1m 19s
Run cargo check with post run db check (ubuntu-16-cores-selfhosted)	1m 0s
Run determinism test	35s
Run CLI tests (ubuntu-16-cores-selfhosted)	33s
Run CLI tests (scrypto) (ubuntu-16-cores-selfhosted)	27s
Run CLI tests (windows-16-cores-selfhosted)	1s
Run CLI tests (scrypto coverage)	1s
Run transaction scenarios	5m 40s
Run CLI tests (scrypto) (windows-16-cores-selfhosted)	1s
Run CLI tests (scrypto) (macos-latest)	5m 44s
phylum-analyze / Analyze dependencies with Phylum	34s
	1h 11m 2s

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