Remove AppVeyor badges and add note

Author: YoshiRulz

README.md

@@ -3,7 +3,6 @@
 A multi-system emulator written in C#. As well as quality-of-life features for casual players, it also has recording/playback and debugging tools, making it the first choice for TASers (Tool-Assisted Speedrunners).
 
 [![(latest) release | GitHub](https://img.shields.io/github/release/TASEmulators/BizHawk.svg?logo=github&logoColor=333333&sort=semver&style=popout)](https://github.com/TASEmulators/BizHawk/releases/latest)
-[![latest dev build | AppVeyor](https://img.shields.io/badge/latest_dev_build-AppVeyor-orange.svg?logo=appveyor&logoColor=333333&style=popout)](https://ci.appveyor.com/project/zeromus/bizhawk-udexo/build/artifacts)
 [![latest dev build | GitLab CI](https://img.shields.io/badge/latest_dev_build-GitLab_CI-orange.svg?logo=gitlab&style=popout)](https://gitlab.com/TASVideos/BizHawk/pipelines/master/latest)
 [![GitHub open issues counter](https://img.shields.io/github/issues-raw/TASEmulators/BizHawk.svg?logo=github&logoColor=333333&style=popout)](https://github.com/TASEmulators/BizHawk/issues)
 
@@ -142,13 +141,13 @@ EmuHawk depends on certain libraries for graphics, and these don't work on macOS
 
 Development builds are made automatically whenever someone contributes. Because of this, we recommend using a release for work that requires stability (such as TASing), and only switching to a dev build if there's a specific change or addition you need.
 
-[![recent dev builds | AppVeyor](https://img.shields.io/badge/recent_dev_builds-AppVeyor-orange.svg?logo=appveyor&logoColor=333333&style=popout)](https://ci.appveyor.com/project/zeromus/bizhawk-udexo/history)
 [![recent dev builds | GitLab CI](https://img.shields.io/badge/recent_dev_builds-GitLab_CI-orange.svg?logo=gitlab&style=popout)](https://gitlab.com/TASVideos/BizHawk/pipelines)
-[![latest dev build | AppVeyor](https://img.shields.io/badge/latest_dev_build-AppVeyor-orange.svg?logo=appveyor&logoColor=333333&style=popout)](https://ci.appveyor.com/project/zeromus/bizhawk-udexo/build/artifacts)
 [![latest dev build | GitLab CI](https://img.shields.io/badge/latest_dev_build-GitLab_CI-orange.svg?logo=gitlab&style=popout)](https://gitlab.com/TASVideos/BizHawk/pipelines/master/latest)
 
+> Note: Due to recent changes by AppVeyor, artifact downloads are no longer available. Use the GitLab CI artifacts.
+
 Click one of the buttons above to download a dev build (they're also at the top of this readme). AppVeyor uses Windows and GitLab CI uses Linux, but they work all the same.
-* On the AppVeyor page for a Build, click "Artifacts", then `BizHawk_Developer-<datetime>-#<long hexadecimal>.zip`.
+* ~~On the AppVeyor page for a Build, click "Artifacts", then `BizHawk_Developer-<datetime>-#<long hexadecimal>.zip`.~~
 * On the GitLab CI page for a Pipeline, click "Jobs", then the download button on the right under the heading "Package". (On the Pipelines list page, there's also a download button on each Pipeline—choose `package_devbuild_*:archive` there.)
 
 To find the dev builds for a specific commit, you can click the green checkmark next to it (in the [commit history](https://github.com/TASEmulators/BizHawk/commits/master), for example) for a dropdown, then click either "Details" link to go to AppVeyor/GitLab.