brew doctor on My Mac mini (M1, 2020)

brew_doctor_warnings.txt

$ brew doctor
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: gettext files detected at a system prefix.
These files can cause compilation and link failures, especially if they
are compiled with improper architectures. Consider removing these files:
  /usr/local/lib/libgettextlib.dylib
  /usr/local/lib/libintl.dylib
  /usr/local/include/libintl.h

Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected dylibs:
  /usr/local/lib/libcgunwind.1.0.dylib

Warning: You have unlinked kegs in your Cellar.
Leaving kegs unlinked can lead to build-trouble and cause formulae that depend on
those kegs to fail to run properly once built. Run `brew link` on these:
  python@3.9

Warning: Your Homebrew's prefix is not /opt/homebrew.
Some of Homebrew's bottles (binary packages) can only be used with the default
prefix (/opt/homebrew).
You will encounter build failures with some formulae.
Please create pull requests instead of asking for help on Homebrew's GitHub,
Twitter or any other official channels. You are responsible for resolving
any issues you experience while you are running this
unsupported configuration.


Warning: Your XQuartz (2.7.7) is outdated.
Please install XQuartz 2.7.11 (or delete the current version).
XQuartz can be updated using Homebrew Cask by running:
  brew reinstall xquartz