Clarify feasible intervals for tweedie power in documentation

[exalate-issue-sync]

Documentation makes it look like the interval is inclusive, while in reality, it is exclusive.

From [~accountid:557058:afd6e9a4-1891-4845-98ea-b5d34a2bc42c]

{noformat}Then it goes on to say that you can enter 1 and 2 to get other distributions. I think the docs can be improved.{noformat}

[h2o-ops-ro]

JIRA Issue Details

Jira Issue: PUBDEV-8535
Assignee: hannah.tillman
Reporter: Michal Kurka
State: Resolved
Fix Version: 3.36.0.3
Attachments: Available (Count: 1)
Development PRs: Available

[h2o-ops-ro]

Attachments From Jira

Attachment Name: Screen Shot 2022-01-18 at 2.10.51 PM.png
Attached By: Michal Kurka
File Link:https://h2o-3-jira-github-migration.s3.amazonaws.com/PUBDEV-8535/Screen Shot 2022-01-18 at 2.10.51 PM.png

[h2o-ops-ro]

Linked PRs from JIRA

#6023