update variables.scss

src/assets/styles/variables.scss

@@ -65,13 +65,13 @@ $flex-align-items: (
 );
 
 @each $key, $value in $flex-justify-content {
-    .flex-j-#{$key} {
+    .justify-#{$key} {
       justify-content: $value;
     }
 }
 
 @each $key, $value in $flex-align-items {
-    .flex-a-#{$key} {
+    .align-#{$key} {
       align-items: $value;
     }
 }
\ No newline at end of file