Release v2.4.5

[pajlada]

In the release PR

• Updated version code in src/common/Version.hpp
• Updated version code in CMakeLists.txt
  This can only be "whole versions", so if you're releasing 2.4.0-beta you'll need to condense it to 2.4.0
• Add a new release at the top of of the releases key in resources/com.chatterino.chatterino.appdata.xml
  This cannot use dash to denote a pre-release identifier, you have to use a tilde instead.
• Updated version code in .CI/chatterino-installer.iss
• Update the changelog ## Unreleased section to the new version CHANGELOG.md
  Make sure to leave the ## Unreleased line unchanged for easier merges

After the PR has been merged

• Tag the release
• Manually run the create-installer workflow.
  This is only necessary if the tag was created after the CI in the main branch finished.
• Start a manual Launchpad import - scroll down & click Import Now
• Make a PPA release to this repo with the debchange command.
  debchange -v 2.4.0 then add the changelog entries
  debchange --release then change the distro to be unstable

[pajlada]

Looks good to me 👍

[github-actions]

clang-tidy made some suggestions

[github-actions]

warning: macro 'CHATTERINO_VERSION' used to declare a constant; consider using a 'constexpr' constant [cppcoreguidelines-macro-usage]

#define CHATTERINO_VERSION "2.4.5"
        ^