To place contents in a file (not claiming this is the most efficient way but it works)

OCRTHISFILE="ocr-test.jpg"

shortcuts run ocr-text -i "${OCRTHISFILE}"

pbpaste > ${OCRTHISFILE}.txt

or to view output and place in file:

OCRTHISFILE="ocr-test.jpg"

shortcuts run ocr-text -i "${OCRTHISFILE}"

pbpaste | tee ${OCRTHISFILE}.txt