Ubuntu 18.04 is getting removed, update Linux base images

.github/workflows/android_test.yml

@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   build-android-8-9:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     continue-on-error: false
     env:
       ARCH: android
@@ -17,7 +17,7 @@ jobs:
       run: ./scripts/test
 
   build-android-10-11:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     continue-on-error: false
     env:
       ARCH: android

.github/workflows/cross_test.yml

@@ -6,7 +6,7 @@ jobs:
   build-other:
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04]
+        os: [ubuntu-20.04, ubuntu-22.04]
         arch: [mingw32, mingw64, arm32, arm64]
     runs-on: ${{ matrix.os }}
     continue-on-error: false

.github/workflows/linux_test.yml

@@ -6,7 +6,7 @@ jobs:
   build-native:
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-22.04]
+        os: [ubuntu-20.04, ubuntu-22.04]
         compiler: [clang, gcc]
     runs-on: ${{ matrix.os }}
     continue-on-error: false