Update url to good first issues
Update url to good first issues

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StalderT/open62541,open62541/open62541,open62541/open62541,jpfr/open62541,JGrothoff/open62541,StalderT/open62541,JGrothoff/open62541,JGrothoff/open62541,jpfr/open62541,open62541/open62541,StalderT/open62541,jpfr/open62541,StalderT/open62541,JGrothoff/open62541,open62541/open62541,jpfr/open62541