Fix repository issues pagination bug when there are more than one label filter (#9512)

modules/templates/helper.go

@@ -269,6 +269,14 @@ func NewFuncMap() []template.FuncMap {
 				return ""
 			}
 		},
+		"contain": func(s []int64, id int64) bool {
+			for i := 0; i < len(s); i++ {
+				if s[i] == id {
+					return true
+				}
+			}
+			return false
+		},
 	}}
 }