Use `flex-end` instead of `end` (#9094)

res/css/views/elements/_UseCaseSelection.pcss

@@ -23,7 +23,7 @@ limitations under the License.
     .mx_UseCaseSelection_title {
         display: flex;
         flex-direction: column;
-        justify-content: end;
+        justify-content: flex-end;
 
         h1 {
             font-weight: 600;
@@ -36,7 +36,7 @@ limitations under the License.
         display: flex;
         flex-direction: column;
         gap: $spacing-8;
-        align-self: end;
+        align-self: flex-end;
 
         h2 {
             margin: 0;