Fix stepper header wrapping

aleksis/apps/paweljong/frontend/components/event_registration/EventRegistrationForm.vue

@@ -24,7 +24,7 @@ import SecondaryActionButton from "aleksis.core/components/generic/buttons/Secon
       <div v-else-if="event">
         <h1 class="text-h4 mb-4">{{ event.displayName }}</h1>
         <v-stepper v-model="step" class="mb-4">
-          <v-stepper-header>
+          <v-stepper-header class="flex-nowrap">
             <template v-for="(stepChoice, index) in steps">
               <v-stepper-step :complete="step > index + 1" :step="index + 1" :key="stepChoice.name">
                 {{ $t(stepChoice.titleKey) }}