Update the code owner of `feeds` service from FMS group to OPCORE

[ro-tex]

The feeds service has FMS team as its code owner but that group is deprecated and replaced by the OPCORE team. This PR updates the ownership.

Requires Dependencies

Resolves Dependencies

[cl-sonarqube-production[bot]]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

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