update chart creation

code/eval/charts/240212_first_try_memgraph.html

code/eval/charts/240212_first_try_memgraph.jpg

code/eval/charts/240212_first_try_neo4j.html

code/eval/charts/240212_first_try_neo4j.jpg

code/eval/charts/240212_first_try_ongdb.html

code/eval/charts/240212_first_try_ongdb.jpg

code/eval/charts/240212_first_try_pg.html

code/eval/charts/240212_first_try_pg.jpg

code/eval/charts/charts.ipynb