🤖 [backports-release-1.9] Bump the Pkg stdlib from 3ca88658d to 7276c7514

[DilumAluthgeBot]

Stdlib: Pkg
URL: https://github.com/JuliaLang/Pkg.jl.git
Stdlib branch: release-1.9
Julia branch: backports-release-1.9
Old commit: 3ca88658d
New commit: 7276c7514
Julia version: 1.9.0
Pkg version: 1.9.0
Bump invoked by: @IanButterworth
Powered by: BumpStdlibs.jl

Diff: JuliaLang/Pkg.jl@3ca8865...7276c75

$ git log --oneline 3ca88658d..7276c7514
7276c7514 Merge pull request #3480 from IanButterworth/ib/backport_1.9
7f21603be remove double backquote (#3478)
2c8408cc6 Use correct threads specification for subprocess (#3467)
b426fb8d5 extensions docs typo (#3474)
d37486d4a remove comments about load paths in relation to extensions (#3476)
e2f6b991d try_prompt_pkg_add: on "other" preselect the first non-default env (#3473)
93bbd4bb2 precompile: fix race in precompiling exts (#3456)
0590bdbd6 update note on package extensions (#3451)
064bb34c3 fix color_string (#3457)