Build Windows Installer in CI (#4408)

* feat: build installer in CI

Co-authored-by: 8thony <114905842+8thony@users.noreply.github.com>

* fix: use inno-setup from PATH

* fix: only match `v*` tags

* fix: don't add to release

* fix: only run on master

---------

Co-authored-by: 8thony <114905842+8thony@users.noreply.github.com>

docs/make-release.md

@@ -5,6 +5,7 @@
        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`
 - [ ] Updated version code 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
 - [ ] Push directly to master :tf: