Use ubuntu-20.04 for test using Ruby 2.2

* https://github.com/ruby/setup-ruby/issues/496#issuecomment-1520667671

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-20.04, ubuntu-22.04, macos-11, macos-12, windows-2019, windows-2022 ]
+        os: [ ubuntu-20.04, ubuntu-22.04, macos-11, macos-12, macos-13, windows-2019, windows-2022 ]
         ruby: [
           '1.9', '2.0', '2.1', '2.2', '2.3', '2.4', '2.5', '2.6', '2.7', '3.0', '3.1', '3.2', ruby-head,
           jruby, jruby-head,
@@ -202,7 +202,7 @@ jobs:
 
   testFixedBundlerVersionForOldRuby:
     name: "Test bundler: 1.x for old Ruby"
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v3
       - uses: ./

README.md

@@ -43,7 +43,7 @@ The action works on these [GitHub-hosted runners](https://docs.github.com/en/act
 | Operating System | Supported |
 | ---------------- | --------- |
 | Ubuntu  | `ubuntu-20.04`, `ubuntu-22.04` |
-| macOS   | `macos-11`, `macos-12` |
+| macOS   | `macos-11`, `macos-12`, `macos-13` |
 | Windows | `windows-2019`, `windows-2022` |
 
 The prebuilt releases are generated by [ruby-builder](https://github.com/ruby/ruby-builder)

common.js

@@ -163,6 +163,7 @@ const GitHubHostedPlatforms = [
   'ubuntu-22.04-x64',
   'macos-11-x64',
   'macos-12-x64',
+  'macos-13-x64',
   'windows-2019-x64',
   'windows-2022-x64',
 ]

dist/index.js

@@ -520,6 +520,7 @@ const GitHubHostedPlatforms = [
   'ubuntu-22.04-x64',
   'macos-11-x64',
   'macos-12-x64',
+  'macos-13-x64',
   'windows-2019-x64',
   'windows-2022-x64',
 ]