DOC/WEB: update versions.json to include 1.4 stable docs url (#45590)
DOC/WEB: update versions.json to include 1.4 stable docs url (#45590)


pandas-dev/pandas,datapythonista/pandas,pandas-dev/pandas,pandas-dev/pandas,datapythonista/pandas,datapythonista/pandas,datapythonista/pandas,pandas-dev/pandas