Update 4.federation.md

[danidan95]

typpo for "frontend"

[changeset-bot]

⚠️ No Changeset found

Latest commit: c5d0428

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[sonarqubecloud]

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

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