Fix markdown lint issues in KDP and OSM docs

[archups]

This PR is to fix the following markdown lint warnings in the OSM and KDP docs

• warning Do not use dollar signs before shell commands no-shell-dollars remark-lint
• warning Emphasis should use * as a marker emphasis-marker remark-lint
• warning Remove 1 line before node no-consecutive-blank-lines remark-lint
• warning Marker style should be - unordered-list-marker-style remark-lint
• warning Missing blank line before block node no-missing-blank-lines remark-lint

[kubermatic-bot]

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