HM-1: Remove 6.4 version from build.yml

Author: jkindly

.github/workflows/build.yml

@@ -23,10 +23,10 @@ jobs:
             fail-fast: false
             matrix:
                 php: [ "8.2", "8.3" ]
-                symfony: ["^6.4", "^7.1"]
+                symfony: [ "^7.1" ]
                 sylius: [ "^2.0" ]
                 node: [ "20.x" ]
-                mysql: ["8.0"]
+                mysql: [ "8.0" ]
                 state_machine_adapter: ["winzou_state_machine", "symfony_workflow"]
 
         env: