docs: Update some old links to our new vanity URLs (#4533)

Signed-off-by: Larry Gritz <[email protected]>

Author: lgritz

.github/ISSUE_TEMPLATE/question.md

@@ -21,7 +21,7 @@ But if you are just asking a question:
 For anything of this nature, the best way to get help using OpenImageIO is
 to ask a question on the [oiio-dev developer mail list](https://lists.aswf.io/g/oiio-dev).
 
-The [documentation](https://openimageio.readthedocs.org)
+The [documentation](https://docs.openimageio.org)
 is pretty comprehensive, so please check there first; you may find the answer
 more quickly than you can get your question answered on the mail list.
 

GOVERNANCE.md

@@ -181,8 +181,8 @@ her absence. Meetings may also be streamed online where appropriate;
 connection details will be posted to the oiio-dev mail list in advance of the
 scheduled meeting.
 
-The biweekly TSC meetings can be found on the [ASWF Calendar](https://www.aswf.io/meeting-calendar),
-just click on the OpenImageIO meeting entries to get the Zoom link.
+The biweekly TSC meetings can be found on the [ASWF Calendar](https://calendar.openimageio.org),
+just click on the OpenImageIO TSC meeting entries to get the Zoom link.
 
 Items are added to the TSC agenda which are considered contentious or are
 modifications of governance, contribution policy, TSC membership, or release

README.md

@@ -157,5 +157,5 @@ pull request (PR) mechanism.
 * [Developer mail list](https://lists.aswf.io/g/oiio-dev)
 * [ASWF Slack](https://slack.aswf.io) (look for the `#openimageio` channel)
 * Biweekly Technical Steering Committee (TSC) Zoom meetings are on the [ASWF
-  Calendar](https://www.aswf.io/meeting-calendar/) (click on the OpenImageIO
+  Calendar](https://calendar.openimageio.org) (click on the OpenImageIO
   meeting entries, every second Monday, to get the Zoom link, anyone may join)