Use correct script name in docs for Windows
Use correct script name in docs for Windows

With this commit we correct the name of the ES batch script to
`elasticsearch.bat` in the docs and use backslashes in path names.

strapdata/elassandra5-rc,strapdata/elassandra5-rc,strapdata/elassandra5-rc,strapdata/elassandra5-rc,strapdata/elassandra5-rc