[TIDOC-1974] Fix warnings reported by JSDuck

Modify the deploy.sh script in doctools to use the JavaScript version of doctools.  Change line #167 from:
`python ${TI_DOCS}/docgen.py -f jsduck -o ./build $module_dirs`
to
`node ${TI_DOCS}/docgen.js -f jsduck -o ./build $module_dirs`

Run deploy.sh.  Should only see warnings for guide names as not valid JS identifiers and unclosed HTML tags.  You can add `-html` to the warnings key in the `jsduck.config` file to suppress unclosed HTML tags warning.