Fix markdown style issues · UPPMAX/UPPMAX-documentation@221367e

Bare URL used [Context: "[email protected]"]

Fenced code blocks should have a language specified [Context: "```"]

Fenced code blocks should be surrounded by blank lines [Context: "```"]

Headings should be surrounded by blank lines [Expected: 1; Actual: 0; Below] [Context: "## Rackham"]

Fenced code blocks should have a language specified [Context: "```"]

Fenced code blocks should have a language specified [Context: "```"]

Fenced code blocks should have a language specified [Context: "```"]

Line length [Expected: 800; Actual: 891]

Inline HTML [Element: jobid]

Inline HTML [Element: jobid]

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v2. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

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