Update docs: fix typos

[KyryloKilin]

Summary

Corrected multiple typographical typos in the Obol documentation across various files to improve clarity and maintain consistency.

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

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