Ignore missing versions in load-docs.sh
Ignore missing versions in load-docs.sh

This makes it possible to make a commit with a release that doesn’t
exist yet (in preparation of it existing). The content won’t show up
until the tag is actually there.

This can be tested locally though with the netlify dev env via
`make docs-serve`

Signed-off-by: Patrick East <1a015b2c287ee8e96f2ec59ce4953b89b37de4a8@gmail.com>

tsandall/opa,tsandall/opa,open-policy-agent/opa,tsandall/opa,open-policy-agent/opa,open-policy-agent/opa,open-policy-agent/opa,tsandall/opa,open-policy-agent/opa,tsandall/opa,tsandall/opa,open-policy-agent/opa