Accessibility review

[ripleymj]

The descriptive link text warning was squelched to appease the markdown linter in 7522a71 (violation here:

presentations/Scripting.md

Line 98 in 94b8123

[here](https://www.gnu.org/software/bash/manual/html_node/Conditional-Constructs.html#index-_005b_005b)).

). Someone should review this and see what can be done to meet JMU's guidelines: https://www.jmu.edu/accessibility/digital-accessibility/index.shtml

[ripleymj]

I also think at one point we looked at enabling metadata outlines, which may help this: marp-team/marp-vscode#381