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

@@ -11224,10 +11224,10 @@ 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 see all the user's personal access tokens you must impersonate them first."

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"