docs: fix doc build error

[bmorelli25]

Summary

This PR fixes a documentation build error for docs.elastic.co. All code blocks must be formatted in markdown code blocks.

• For https://github.com/elastic/wordlake/pull/50.

[bmorelli25]

Please feel free to merge this PR. And if someone could please publish these changes to the prod branch of EPR, that would be greatly appreciated.

[elasticmachine]

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• Start Time: 2022-10-26T17:33:07.037+0000

• Duration: 14 min 39 sec

Test stats 🧪

Test	Results
Failed	0
Passed	2
Skipped	0
Total	2

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (0/0)	💚
Files	100.0% (0/0)	💚 2.488
Classes	100.0% (0/0)	💚 2.488
Methods	25.0% (1/4)	👎 -65.555
Lines	100.0% (0/0)	💚 8.43
Conditionals	100.0% (0/0)	💚