drop support of Ubuntu 20.04

.github/workflows/linux-x64.yml

@@ -65,7 +65,7 @@ jobs:
           PERL5LIB: ${{ github.workspace }}/scripts/lib
 
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     needs:
       - list
       - sanity-check
@@ -124,7 +124,7 @@ jobs:
           subject-path: ${{ runner.temp }}/*.tar.zstd
 
   build-multi-thread:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     needs:
       - sanity-check
       - list

.github/workflows/test.yml

@@ -25,7 +25,6 @@ jobs:
         os:
           - ubuntu-24.04
           - ubuntu-22.04
-          - ubuntu-20.04
           - ubuntu-24.04-arm
           - ubuntu-22.04-arm
         multi-thread:

.github/workflows/update-build-tools.yml

@@ -13,7 +13,7 @@ on:
 
 jobs:
   linux:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

README.md

@@ -82,11 +82,11 @@ This option is available on Windows and falls back to the default customized bin
 
 The action works for [GitHub-hosted runners](https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners).
 
-| Operating System | Supported Versions                             |
-| ---------------- | ---------------------------------------------- |
-| Linux            | `ubuntu-20.04`, `ubuntu-22.04`, `ubuntu-24.04` |
-| macOS            | `macos-13`, `macos-14`, `macos-15`             |
-| Windows          | `windows-2019`, `windows-2022`                 |
+| Operating System | Supported Versions                 |
+| ---------------- | ---------------------------------- |
+| Linux            | `ubuntu-22.04`, `ubuntu-24.04`     |
+| macOS            | `macos-13`, `macos-14`, `macos-15` |
+| Windows          | `windows-2019`, `windows-2022`     |
 
 [Self-hosted runners](https://docs.github.com/en/actions/hosting-your-own-runners) are not supported.