conf(ci/github): update php versions (8.0 & 8.1)

.github/workflows/php-unit-test.yml

@@ -21,8 +21,8 @@ jobs:
     runs-on: ${{ matrix.operating-system }}
     strategy:
       matrix:
-        operating-system: [ubuntu-20.04]
-        php-versions: ['7.4', '8.0']
+        operating-system: [ubuntu-22.04]
+        php-versions: ['8.0', '8.1']
 
     name: PHP ${{ matrix.php-versions }} Test on ${{ matrix.operating-system }}
     steps:
@@ -39,7 +39,6 @@ jobs:
         sudo systemctl start mysql.service
         mysql -uroot -proot --host 127.0.0.1 -e 'CREATE DATABASE IF NOT EXISTS tine20;'
         mysql -uroot -proot --host 127.0.0.1 -e "ALTER USER root@localhost IDENTIFIED WITH mysql_native_password BY 'root';"
-        
 
     - name: Install tine20
       run: |