Fix R example for GAM

[exalate-issue-sync]

The R example in the GAM chapter needs to be updated slightly.
https://github.com/h2oai/h2o-3/blob/rel-zahradnik/h2o-docs/src/product/data-science/gam.rst#example

Remove the '' around each value when creating the frame knots. So instead of:
{code}
knots1 <- c('-1.99905699', '-0.98143075', '0.02599159', '1.00770987', '1.99942290')
{code}
use
{code}
knots1 <- c(-1.99905699, -0.98143075, 0.02599159, 1.00770987, 1.99942290)
{code}
Note that the Python example is already correct.

[h2o-ops]

JIRA Issue Migration Info

Jira Issue: PUBDEV-7447
Assignee: hannah.tillman
Reporter: Angela Bartz
State: Resolved
Fix Version: 3.30.0.2
Attachments: N/A
Development PRs: Available

Linked PRs from JIRA

#4507