Rollup merge of #133034 - onur-ozkan:new-default, r=jieyouxu

update download-rustc comments and default

See https://github.com/rust-lang/rust/pull/132872#issuecomment-2476135053
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Guillaume Gomez 2024-11-14 15:16:16 +01:00 committed by GitHub
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@ -503,8 +503,8 @@
# Set this to "if-unchanged" if you are working on `src/tools`, `tests` or `library` (on CI, `library`
# changes triggers in-tree compiler build) to speed up the build process.
#
# Set this to `true` to download unconditionally.
#download-rustc = false
# Set this to `true` to always download or `false` to always use the in-tree compiler.
#download-rustc = "if-unchanged"
# Number of codegen units to use for each compiler invocation. A value of 0
# means "the number of cores on this machine", and 1+ is passed through to the