[TF Plugin Docs] - Edit data source template files

[sheneska]

Description

This PR edits the following data source template files:

• all_namespaces.md.tmpl
• config_map.md.tmpl
• config_map_v1.md.tmpl
• endpoints_v1.md.tmpl
• ingress.md.tmpl
• ingress_v1.md.tmpl
• mutating_webhook_configuration_v1.md.tmpl
• namespace.md.tmpl
• namespace_v1.md.tmpl
• nodes.md.tmpl

Acceptance tests

• Have you added an acceptance test for the functionality being added?
• Have you run the acceptance tests on this branch?

Output from acceptance testing:

$ make testacc TESTARGS='-run=TestAccXXX'

...

Release Note

Release note for CHANGELOG:

...

References

Community Note

• Please vote on this issue by adding a 👍 reaction to the original issue to help the community and maintainers prioritize this request
• If you are interested in working on this issue or have submitted a pull request, please leave a comment