Add PHP 8.6 to build matrix (#1986)

Author: DerManoMann

.github/workflows/build.yml

@@ -19,7 +19,7 @@ jobs:
       fail-fast: true
       matrix:
         operating-system: [ ubuntu-latest ]
-        php: [ '8.2', '8.3', '8.4', '8.5' ]
+        php: [ '8.2', '8.3', '8.4', '8.5', '8.6' ]
         dependencies: [ 'lowest', 'highest' ]
 
     name: PHP ${{ matrix.php }} on ${{ matrix.operating-system }} with ${{ matrix.dependencies }} dependencies

.github/workflows/security-checks.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: true
       matrix:
         operating-system: [ ubuntu-latest ]
-        php: [ '8.2', '8.3', '8.4', '8.5' ]
+        php: [ '8.2', '8.3', '8.4', '8.5', '8.6' ]
         dependencies: [ 'highest' ]
 
     name: PHP ${{ matrix.php }} on ${{ matrix.operating-system }} with ${{ matrix.dependencies }} dependencies