fix: Markdownlint with review dawg - #19

[markdownlint] reported by reviewdog 🐶 error MD049/emphasis-style Emphasis style [Expected: underscore; Actual: asterisk] Raw Output: content/wifi.md:96:39 error MD049/emphasis-style Emphasis style [Expected: underscore; Actual: asterisk]

[markdownlint] reported by reviewdog 🐶 error MD049/emphasis-style Emphasis style [Expected: underscore; Actual: asterisk] Raw Output: content/wifi.md:96:34 error MD049/emphasis-style Emphasis style [Expected: underscore; Actual: asterisk]

[markdownlint] reported by reviewdog 🐶 error MD031/blanks-around-fences Fenced code blocks should be surrounded by blank lines [Context: "```sh"] Raw Output: content/tiny_ethernet.md:115 error MD031/blanks-around-fences Fenced code blocks should be surrounded by blank lines [Context: "```sh"]

[markdownlint] reported by reviewdog 🐶 error MD031/blanks-around-fences Fenced code blocks should be surrounded by blank lines [Context: "```sh"] Raw Output: content/tiny_ethernet.md:101 error MD031/blanks-around-fences Fenced code blocks should be surrounded by blank lines [Context: "```sh"]

[markdownlint] reported by reviewdog 🐶 error MD059/descriptive-link-text Link text should be descriptive [Context: "[here]"] Raw Output: content/eduroam.md:25:111 error MD059/descriptive-link-text Link text should be descriptive [Context: "[here]"]