fix CI

Signed-off-by: PragmaTwice <twice@apache.org>

Author: PragmaTwice

.github/workflows/build.yml

@@ -23,17 +23,17 @@ jobs:
     strategy:
       matrix:
         include:
-          - os: ubuntu-20.04
+          - os: ubuntu-22.04
             type: Debug
             cxx: gcc
-          - os: ubuntu-20.04
+          - os: ubuntu-22.04
             type: Release
             cxx: gcc
             coverage: -DCMAKE_CXX_FLAGS=--coverage
-          - os: ubuntu-20.04
+          - os: ubuntu-22.04
             type: Debug
             cxx: clang
-          - os: ubuntu-20.04
+          - os: ubuntu-22.04
             type: Release
             cxx: clang
           - os: windows-2019

.github/workflows/doc.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   doc:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v2
         with: