ci(build): remove ubuntu-20.04

Signed-off-by: Xin Liu <[email protected]>

Author: apepkuss

.github/workflows/build.yml

@@ -33,7 +33,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-22.04, ubuntu-20.04, macos-12, macos-13]
+        os: [ubuntu-22.04, macos-12, macos-13]
     steps:
       - name: Clone project
         id: checkout