Merge branch 'aregnery/update-create-file-variant' into 'master'

Update button variant and category for creating a file in an empty branch

See merge request gitlab-org/gitlab!77313

app/assets/javascripts/vue_merge_request_widget/components/states/nothing_to_merge.vue

@@ -62,8 +62,8 @@ export default {
           <gl-button
             v-if="mr.newBlobPath"
             :href="mr.newBlobPath"
-            category="secondary"
-            variant="success"
+            category="primary"
+            variant="confirm"
             data-testid="createFileButton"
             @click="onClickNewFile"
           >