[DPE-TO] LookupError: unknown encoding: shiftjis

Sentry Issue: SOLAR-32R

LookupError: unknown encoding: shiftjis
(8 additional frame(s) were not displayed)
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  File "djdocuments/views/mixins.py", line 58, in get_context_data
    img_tag = gerar_tag_img_base64_png_qr_str(self.request, self.object)
  File "djdocuments/utils/base64utils.py", line 32, in gerar_tag_img_base64_png_qr_str
    codigo_qr = pyqrcode.create(url)
  File "__init__.py", line 112, in create
    return QRCode(content, error, version, mode, encoding)
  File "__init__.py", line 138, in __init__
    guessed_content_type = self._detect_content_type(content)
  File "__init__.py", line 312, in _detect_content_type
    c = content.encode('shiftjis')