2.0.7

This is the release of opam 2.0.7.

This minor release contains small fixes, please see blog post for upgrade instructions.

Binaries and full archive are signed by @AltGr.
As an addendum to this release, the macOS/arm64 binary was built by @avsm (but not yet signed).

Changelog:

• Properly escape Windows paths on manpages [#4129 @AltGr @rjbou]
• Fix opam installer opam file [#4058 @rjbou]
• Fix various warnings [#4132 @rjbou @AltGr - fix #4100]
• Fix dune 2.5.0 promote-install-files duplication [#4132 @rjbou ]
• opam exec: display command not found message [#4133 @rjbou - fix #4131]