Switch version in main branch to 4.0.0.dev #12516

Job	Run time
Install Rubygems on Windows (3.3)	3m 27s
Install Rubygems on Windows (3.2)	3m 39s
Handling gems shipped by default with RVM (3.2, 3.2.9)	12s
Install Rubygems on Windows (jruby)	4m 29s
Handling gems shipped by default with RVM (3.3, 3.3.9)	10s
Handling gems shipped by default with RVM (3.4, 3.4.5)	11s
Handling issues with a shared gem home (system)	20s
Handling issues with a shared gem home (dev)	24s
Install Rubygems on Ubuntu (3.4, no-openssl)	1m 43s
Install Rubygems on Ubuntu (3.2, no-openssl)	1m 49s
Install Rubygems on Ubuntu (3.3, no-openssl)	1m 58s
Install Rubygems on Ubuntu (3.2, openssl)	2m 5s
Install Rubygems on Ubuntu (3.4, openssl)	2m 2s
Install Rubygems on Windows (3.4)	4m 5s
Install Rubygems on Ubuntu (3.3, openssl)	2m 20s
Install Rubygems on Ubuntu (jruby, openssl)	3m 42s
Install Rubygems on Ubuntu (truffleruby, openssl)	3m 31s
Install Rubygems on Ubuntu (jruby, no-openssl)	3m 21s
Install Rubygems on Ubuntu (truffleruby, no-openssl)	2m 59s
All install-rubygems jobs pass	4s
	42m 31s

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