v1.6.1+wn22

This patch release for Winter 2022 fixes some bugs I observed in code blocks after deploying v1.6.0 to the EECS 280 websites.

• Tolerate whitespace when parsing code block HTML in #140
• Assign unique anchor ID to codeblockcks with the same title in #141
• Remove border from inline-code in tables in dark mode in #142