Add instructions for DropN, truncate0, and Refs #9756

Job	Run time
ormolu	14s
build ucm (ubuntu-20.04)	11s
build ucm (macOS-13)	17s
build ucm (windows-2019)	5m 26s
run interpreter tests (ubuntu-20.04)	6s
run interpreter tests (macos-13)	10s
generate jit source	6s
run transcripts (ubuntu-20.04)	4m 6s
run transcripts (macos-13)	6m 55s
run transcripts (windows-2019)	6m 31s
build jit binary / build jit binary (ubuntu-20.04)	13s
build jit binary / build jit binary (macOS-13)	17s
build jit binary / build jit binary (windows-2019)	21s
test jit / test jit (ubuntu-20.04)	12s
test jit / test jit (macOS-13)	15s
	25m 20s

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