go: Use errors.Is over ==

Client: go

Fix 2 instances we are using == to check on error but should have used
errors.Is instead.

lib/go/thrift/header_transport.go

@@ -128,7 +128,7 @@ var _ io.ReadCloser = (*TransformReader)(nil)
 //
 // If you don't know the closers capacity beforehand, just use
 //
-//     &TransformReader{Reader: baseReader}
+//	&TransformReader{Reader: baseReader}
 //
 // instead would be sufficient.
 func NewTransformReaderWithCapacity(baseReader io.Reader, capacity int) *TransformReader {
@@ -544,7 +544,7 @@ func (t *THeaderTransport) Read(p []byte) (read int, err error) {
 			// the last Read finished the frame, do endOfFrame
 			// handling here.
 			err = t.endOfFrame()
-		} else if err == io.EOF {
+		} else if errors.Is(err, io.EOF) {
 			err = t.endOfFrame()
 			if err != nil {
 				return

lib/go/thrift/simple_json_protocol.go

@@ -1195,7 +1195,7 @@ func (p *TSimpleJSONProtocol) readNumeric() (Numeric, error) {
 	for continueFor {
 		c, err := p.reader.ReadByte()
 		if err != nil {
-			if err == io.EOF {
+			if errors.Is(err, io.EOF) {
 				break
 			}
 			return NUMERIC_NULL, NewTProtocolException(err)