This does not look like Bacterial Leaf Scorch, and the sap-feeding insect that transmits that particular disease probably would not have utilized that small of an oak seedling. It does look like abiotic (not pest- or disease-caused) scorch, though, likely from the transplant shock and perhaps getting too dry at one point. Give the tree time to recover and put out new growth, which may or may not happen this season (sometimes trees are done with new leaf growth by early summer), but foliage should emerge unscathed next spring at the very least. If possible, monitor any  new planting, regardless of plant age, by feeling the soil several inches deep next to the root zone and watering well once the soil becomes somewhat dry to the touch at that depth.

Miri

Hi Miri,