chore(deps): Bump untergeek/curator (openwallet-foundation#3685)

Bumps untergeek/curator from 8.0.16 to 8.0.21.

---
updated-dependencies:
- dependency-name: untergeek/curator
  dependency-version: 8.0.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: jamshale <[email protected]>
Co-authored-by: Stephen Curran <[email protected]>

Author: 3 people

demo/elk-stack/extensions/curator/Dockerfile

@@ -1,4 +1,4 @@
-FROM untergeek/curator:8.0.16@sha256:8ab15516eb320bddb042c6da3c81b57e4e69a7aac04efc32190db979fe0bfb5b
+FROM untergeek/curator:8.0.21@sha256:eca135f7f6e1781cfbca9e7cb3fa8237a481cfd815aa7ef52b38adb268ab6f97
 
 USER root