Fix typo on confidential MR dropdown

Change issues to issue's

app/assets/javascripts/confidential_merge_request/components/project_form_group.vue

@@ -41,7 +41,7 @@ export default {
     noForkText() {
       return sprintf(
         __(
-          'To protect this issues confidentiality, %{link_start}fork the project%{link_end} and set the forks visiblity to private.',
+          "To protect this issue's confidentiality, %{link_start}fork the project%{link_end} and set the forks visiblity to private.",
         ),
         { link_start: `<a href="${this.newForkPath}" class="help-link">`, link_end: '</a>' },
         false,
@@ -118,7 +118,7 @@ export default {
         <template v-if="projects.length">
           {{
             __(
-              'To protect this issues confidentiality, a private fork of this project was selected.',
+              "To protect this issue's confidentiality, a private fork of this project was selected.",
             )
           }}
         </template>

locale/gitlab.pot

@@ -14535,10 +14535,10 @@ msgstr ""
 msgid "To preserve performance only <strong>%{display_size} of %{real_size}</strong> files are displayed."
 msgstr ""
 
-msgid "To protect this issues confidentiality, %{link_start}fork the project%{link_end} and set the forks visiblity to private."
+msgid "To protect this issue's confidentiality, %{link_start}fork the project%{link_end} and set the forks visiblity to private."
 msgstr ""
 
-msgid "To protect this issues confidentiality, a private fork of this project was selected."
+msgid "To protect this issue's confidentiality, a private fork of this project was selected."
 msgstr ""
 
 msgid "To receive alerts from manually configured Prometheus services, add the following URL and Authorization key to your Prometheus webhook config file. Learn more about %{linkStart}configuring Prometheus%{linkEnd} to send alerts to GitLab."

spec/frontend/confidential_merge_request/components/__snapshots__/project_form_group_spec.js.snap

@@ -19,7 +19,7 @@ exports[`Confidential merge request project form group component renders empty s
       <br />
        
       <span>
-        To protect this issues confidentiality, 
+        To protect this issue's confidentiality, 
         <a
           class="help-link"
           href="https://test.com"
@@ -69,7 +69,7 @@ exports[`Confidential merge request project form group component renders fork dr
       <br />
        
       <span>
-        To protect this issues confidentiality, 
+        To protect this issue's confidentiality, 
         <a
           class="help-link"
           href="https://test.com"