Tooling updates

[maddenp-noaa]

Synopsis

Two small tooling updates:

1. Fix the format script so that, when a .json or .jsonschema file has not changed, its timestamp will not be updated by format. This has been the cause, recently, of make devshell often recreating the development environment apparently unnecessarily: The Makefile rules depend on the timestamps of meta.yaml and info.json, and the latter was being updated by format (aka make format) even when its content wasn't changing.
2. Trim the CODEOWNERS file to those currently on the project.
3. Remove troublesome gnu.org links from docs.
4. Update recipe/meta.json with == in package pins.

Type

• Tooling (CI, code-quality, packaging, revision-control, etc.)

Impact

• This is a non-breaking change (existing functionality continues to work as expected)

Checklist

• I have added myself and any co-authors to the PR's Assignees list.
• I have reviewed the documentation and have made any updates necessitated by this change.

[christinaholtNOAA]

LGTM.