Update Cargo.toml license

[pombredanne]

Ubuntu-font-1.0 is now in SPDX

Reference: https://spdx.org/licenses/Ubuntu-font-1.0.html
Reference: https://github.com/aboutcode-org/scancode-toolkit/blob/824163fa6fc3fff25e455eaae110019e683fa442/src/licensedcode/data/licenses/ubuntu-font-1.0.LICENSE#L11

[pombredanne]

Note also that the license tag for this crates may be missing the MIT and Bistream-Vera licenses listed in #2321

• https://github.com/emilk/egui/blob/3c7ad0ee12a794fa81882e8364e3f25e5d8c11d6/crates/epaint_default_fonts/fonts/Hack-Regular.txt should be : MIT AND Bistream-Vera AND LicenseRef-scancode-public-domain

  • egui/crates/epaint_default_fonts/fonts/Hack-Regular.txt

    Line 3 in 3c7ad0e

    The work in the DejaVu project was committed to the public domain.

  • https://scancode-licensedb.aboutcode.org/bitstream.html
  • https://scancode-licensedb.aboutcode.org/public-domain.html

• https://github.com/emilk/egui/blob/3c7ad0ee12a794fa81882e8364e3f25e5d8c11d6/crates/epaint_default_fonts/fonts/emoji-icon-font-mit-license.txt should be MIT

Therefore a correct license should likely be instead:
license = "(MIT OR Apache-2.0) AND MIT AND OFL-1.1 AND Ubuntu-font-1.0 AND Bitstream-Vera AND LicenseRef-scancode-public-domain"

The deny list should be updated too in all cases

egui/deny.toml

Line 81 in 3c7ad0e

"LicenseRef-UFL-1.0", # no official SPDX, see https://github.com/emilk/egui/issues/2321

@repi @alex-pinkus FYI, because of your involvement in #2321

[pombredanne]

@AnotherDaniel FYI

[emilk]

Those additional changes makes sense to me - do you want to include them in this PR?