Change plural "merge request" to "merge requests"

app/assets/javascripts/issuable/components/csv_export_modal.vue

@@ -63,7 +63,7 @@ export default {
         </gl-sprintf>
         <gl-sprintf
           v-else
-          :message="n__('1 merge request selected', '%d merge request selected', issuableCount)"
+          :message="n__('1 merge request selected', '%d merge requests selected', issuableCount)"
         >
           <template #issuableCount>{{ issuableCount }}</template>
         </gl-sprintf>

locale/gitlab.pot

@@ -1263,7 +1263,7 @@ msgstr[0] ""
 msgstr[1] ""
 
 msgid "1 merge request selected"
-msgid_plural "%d merge request selected"
+msgid_plural "%d merge requests selected"
 msgstr[0] ""
 msgstr[1] ""