Change Text of Individual labels on map ( OpenLayers )

Question

I want to change the text of a place on OpenLayers map, it needs to be changed from Persian Gulf to Arabian Gulf

 

I tried to see if there is any way I can make this change using the OpenLayers API documentation and found no luck.

 

https://openlayers.org/en/latest/apidoc/

 

Following is code :

import TileLayer from 'ol/layer/Tile';
import VectorLayer from 'ol/layer/Vector';
vectorSource = new VectorSource({
// url: '/assets/data/countries.geojson',
url: '/assets/data/countries.json',
format: new GeoJSON()
});
mapLayer = new VectorLayer({
source: this.vectorSource,
declutter: true
});
markerLayer = new VectorLayer({
source: new VectorSource({}),
style: this.mapStyle
});
linesLayer = new VectorLayer({
source: new VectorSource({}),
style: this.lineStyle
});

Is there any way to change this? I am still going through the OpenLayers API to find if there is anyway.

 

Following is the map location