Temporarily revert default renderer to sandwich while investigating regressions in macOS Preview

docs/release_notes.rst

@@ -30,6 +30,13 @@ OCRmyPDF typically supports the three most recent Python versions.
 
 .. |OCRmyPDF PyPI| image:: https://img.shields.io/pypi/v/ocrmypdf.svg
 
+
+v16.0.2
+=======
+
+-  Temporarily changed PDF text renderer back to sandwich by default to address
+   regressions in macOS Preview.
+
 v16.0.1
 =======
 

src/ocrmypdf/builtin_plugins/tesseract_ocr.py

@@ -146,7 +146,7 @@ def check_options(options):
 
     # Decide on what renderer to use
     if options.pdf_renderer == 'auto':
-        options.pdf_renderer = 'hocr'
+        options.pdf_renderer = 'sandwich'
 
     if not tesseract.has_thresholding() and options.tesseract_thresholding != 0:
         log.warning(