chore: upgrade redocly to v1.30.0 in mgmtapi

[romshark]

Upgrading redocly might help eliminate some of the pending dependabot alerts.

[jiceatscion]

This change is 

[jiceatscion]

Reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @romshark)

[romshark]

Main problem:

(14:37:32) ERROR: /home/romshark/shared/scion/spec/BUILD.bazel:4:15: Openapi spec/control-no-header.bzl.gen.yml failed: (Exit 1): control-no-header__js_binary failed: error executing command (from target //spec:control-no-header) bazel-out/aarch64-opt-exec-2B5CBBC6/bin/spec/control-no-header__js_binary_/control-no-header__js_binary bundle --output ../../../bazel-out/aarch64-fastbuild/bin/spec/control-no-header.bzl.gen.yml ... (remaining 1 argument skipped)

Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
node:internal/modules/cjs/loader:998
  throw err;
  ^

Error: Cannot find module '@redocly/config/lib/reference-docs-config-schema'
Require stack:

[romshark]

Unfortunately, I wasn't able yet to make Bazel provide the requirements of redocly v1.30.0 into the sandbox and I'm not quite sure why.