Add secrets API doc (#2122)
Add secrets API doc (#2122)

* Add secrets API doc

* Update content/sensu-go/5.17/api/secrets.md

Co-Authored-By: Nikki Attea <e6c2ecc2e388fb04d0ff15d566d3dd54cecc8378@sensu.io>

* Apply suggestions from code review

* Correct json for GET single provider or secret

* Update to replace Env with VaultProvider examples

* Update content/sensu-go/5.17/api/secrets.md

Co-Authored-By: Nikki Attea <e6c2ecc2e388fb04d0ff15d566d3dd54cecc8378@sensu.io>

* Update content/sensu-go/5.17/api/secrets.md

Co-Authored-By: Nikki Attea <e6c2ecc2e388fb04d0ff15d566d3dd54cecc8378@sensu.io>

* Update content/sensu-go/5.17/api/secrets.md

Co-Authored-By: Nikki Attea <e6c2ecc2e388fb04d0ff15d566d3dd54cecc8378@sensu.io>

* Update content/sensu-go/5.17/api/secrets.md

Co-Authored-By: Nikki Attea <e6c2ecc2e388fb04d0ff15d566d3dd54cecc8378@sensu.io>

* Apply suggestions from code review

Co-Authored-By: Nikki Attea <e6c2ecc2e388fb04d0ff15d566d3dd54cecc8378@sensu.io>

Co-authored-by: Nikki Attea <e6c2ecc2e388fb04d0ff15d566d3dd54cecc8378@sensu.io>

sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs