Fix some typos found by codespell

See,
$ codespell -S "./.git*,./vendor*,./public*"

pkg/services/sqlstore/migrations/annotation_mig.go

@@ -105,7 +105,7 @@ func addAnnotationMig(mg *Migrator) {
 	}))
 
 	//
-	// Convert epoch saved as seconds to miliseconds
+	// Convert epoch saved as seconds to milliseconds
 	//
 	updateEpochSql := "UPDATE annotation SET epoch = (epoch*1000) where epoch < 9999999999"
 	mg.AddMigration("Convert existing annotations from seconds to milliseconds", NewRawSqlMigration(updateEpochSql))

pkg/services/sqlstore/transactions_test.go

@@ -39,7 +39,7 @@ func TestTransaction(t *testing.T) {
 			So(err, ShouldEqual, models.ErrInvalidApiKey)
 		})
 
-		Convey("wont update if one handler fails", func() {
+		Convey("won't update if one handler fails", func() {
 			err := ss.InTransaction(context.Background(), func(ctx context.Context) error {
 				err := DeleteApiKeyCtx(ctx, deleteApiKeyCmd)
 				if err != nil {