MDL-76443 GitHub: Bump workflow max PHP to 8.3

.github/workflows/push.yml

@@ -16,7 +16,7 @@ on:
         default: ''
 
 env:
-  php: 8.2
+  php: 8.3
 
 jobs:
   Grunt:
@@ -68,7 +68,7 @@ jobs:
             db: mysqli
           # PostgreSQL builds always run with the highest PHP supported version.
           - os: ubuntu-22.04
-            php: 8.2
+            php: 8.3
             db: pgsql
 
     steps:

.github/workflows/windows.yml

@@ -8,7 +8,7 @@ on:
         required: false
         default: ''
 env:
-  php: 8.2
+  php: 8.3
 
 jobs:
   Grunt:
@@ -51,7 +51,7 @@ jobs:
       matrix:
         include:
           - os: windows-latest
-            php: 8.2
+            php: 8.3
             # Ideally we should use mysql/mariadb, but they are 4x slower without tweaks and configuration
             # so let's run only postgres (1.5h vs 6h) only, If some day we want to improve the mysql runs,
             # this is the place to enable them.