MM-43663 - add missing words to email invite (#20794)

Co-authored-by: Pablo Velez Vidal <pablo.velez@mattermost.com>

i18n/en.json

@@ -3337,11 +3337,11 @@
   },
   {
     "id": "api.templates.invite_team_and_channel_body.title",
-    "translation": "{{ .SenderName }} invited you to join {{ .ChannelName }} on the {{ .TeamDisplayName }} Team"
+    "translation": "{{ .SenderName }} invited you to join the {{ .ChannelName }} Channel on the {{ .TeamDisplayName }} Team"
   },
   {
     "id": "api.templates.invite_team_and_channel_subject",
-    "translation": "[{{ .SiteName }}] {{ .SenderName }} invited you to join {{ .ChannelName }} on the {{ .TeamDisplayName }} Team"
+    "translation": "[{{ .SiteName }}] {{ .SenderName }} invited you to join the {{ .ChannelName }} Channel on the {{ .TeamDisplayName }} Team"
   },
   {
     "id": "api.templates.invite_team_and_channels_body.title",