Modernize packaging episode - #336

CRITICAL: Title level inconsistent:

CRITICAL: Title level inconsistent:

Lexing literal_block "{'User-Agent': 'python-requests/2.28.1',\n 'Accept-Encoding': 'gzip, deflate, br',\n 'Accept': '*/*',\n 'Connection': 'keep-alive',\n 'example-user-id' : 'example-password'}\n" as "json" resulted in an error at token: "'". Retrying in relaxed mode.

Lexing literal_block "{'User-Agent': 'python-requests/2.28.1',\n 'Accept-Encoding': 'gzip, deflate, br',\n 'Accept': '*/*',\n 'Connection': 'keep-alive'}\n" as "json" resulted in an error at token: "'". Retrying in relaxed mode.

No mime type available in priority list for builder 'pyppeteer' ('text/plain') [mystnb.mime_priority]

Lexing literal_block "{'User-Agent': 'python-requests/2.28.1',\n 'Accept-Encoding': 'gzip, deflate, br',\n 'Accept': '*/*',\n 'Connection': 'keep-alive',\n 'example-user-id' : 'example-password'}\n" as "json" resulted in an error at token: "'". Retrying in relaxed mode.

Lexing literal_block "{'User-Agent': 'python-requests/2.28.1',\n 'Accept-Encoding': 'gzip, deflate, br',\n 'Accept': '*/*',\n 'Connection': 'keep-alive'}\n" as "json" resulted in an error at token: "'". Retrying in relaxed mode.

Lexing literal_block "{'User-Agent': 'python-requests/2.28.1',\n 'Accept-Encoding': 'gzip, deflate, br',\n 'Accept': '*/*',\n 'Connection': 'keep-alive',\n 'example-user-id' : 'example-password'}\n" as "json" resulted in an error at token: "'". Retrying in relaxed mode.

Lexing literal_block "{'User-Agent': 'python-requests/2.28.1',\n 'Accept-Encoding': 'gzip, deflate, br',\n 'Accept': '*/*',\n 'Connection': 'keep-alive'}\n" as "json" resulted in an error at token: "'". Retrying in relaxed mode.