Correct spelling (#36783)

I was testing typos-cli and fixed some misspelled wording here.
All changes are internal — no public API fields, database columns,
locale keys, or migration names are affected.

services/issue/assignee.go

@@ -20,10 +20,10 @@ import (
 // DeleteNotPassedAssignee deletes all assignees who aren't passed via the "assignees" array
 func DeleteNotPassedAssignee(ctx context.Context, issue *issues_model.Issue, doer *user_model.User, assignees []*user_model.User) (err error) {
 	var found bool
-	oriAssignes := make([]*user_model.User, len(issue.Assignees))
-	_ = copy(oriAssignes, issue.Assignees)
+	oriAssignees := make([]*user_model.User, len(issue.Assignees))
+	_ = copy(oriAssignees, issue.Assignees)
 
-	for _, assignee := range oriAssignes {
+	for _, assignee := range oriAssignees {
 		found = false
 		for _, alreadyAssignee := range assignees {
 			if assignee.ID == alreadyAssignee.ID {