Nav fix actions (#429)

* Update docs.json

* Update actions-unit-test.mdx

Author: nick-gagliardi

main/docs.json

@@ -1234,6 +1234,7 @@
                             "pages": [
                               "docs/customize/custom-domains/multiple-custom-domains",
                               "docs/customize/custom-domains/multiple-custom-domains/mcd-use-cases",
+                              "docs/customize/custom-domains/multiple-custom-domains/saml-migration",
                               "docs/customize/custom-domains/multiple-custom-domains/mcd-best-practices"
                             ]
                           }
@@ -1424,6 +1425,8 @@
                           "docs/customize/actions/use-cases",
                           "docs/customize/actions/action-coding-guidelines",
                           "docs/customize/actions/limitations",
+                          "docs/customize/actions/actions-npm",
+                          "docs/customize/actions/actions-unit-test",
                           "docs/customize/actions/transaction-metadata",
                           "docs/customize/actions/manage-dependencies",
                           "docs/customize/actions/manage-versions",

main/docs/customize/actions/actions-unit-test.mdx

@@ -555,4 +555,4 @@ describe('onExecuteCustomEmailProvider', () => {
 
 To learn more about `@auth0/actions`, visit: https://www.npmjs.com/package/@auth0/actions.
 
-To learn more about writing Actions, read [Write Your First Action](/customize/actions/write-your-first-action).
+To learn more about writing Actions, read [Write Your First Action](/docs/customize/actions/write-your-first-action).