To disable/deactivate zoom effect from images after hover on it (Article addon) you have use custom CSS to override default style:

#sp-page-builder .sppb-addon-article .sppb-article-image-wrap .sppb-img-wrapper img,
#sp-page-builder .sppb-addon-article .sppb-article-image-wrap .sppb-img-wrapper img:hover {
    -webkit-transform: none;
    transform: none;
}

You can add this into custom.css file OR in custom CSS field in template settings.