Miniforge installer code uses BSD-3-Clause license as stated below.

Binary packages that come with it have their own licensing terms
and by installing miniforge you agree to the licensing terms of individual
packages as well. They include different OSI-approved licenses including
the GNU General Public License and can be found in pkgs/<pkg-name>/info/licenses
folders.

Miniforge installer comes with a boostrapping executable that is used
when installing miniforge and is deleted after miniforge is installed.
The bootstrapping executable uses micromamba, cli11, cpp-filesystem,
curl, c-ares, krb5, libarchive, libev, lz4, nghttp2, openssl, libsolv,
nlohmann-json, reproc and zstd which are licensed under BSD-3-Clause,
MIT and OpenSSL licenses. Licenses and copyright notices of these
projects can be found at the following URL.
https://github.com/conda-forge/micromamba-feedstock/tree/master/recipe.

=============================================================================

Copyright (c) 2019-2022, conda-forge
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors
may be used to endorse or promote products derived from this software without
specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.