Add bloblang sample extension

Author: JakeSCahill

local-antora-playbook.yml

@@ -38,6 +38,7 @@ antora:
   extensions:
   - require: '@redpanda-data/docs-extensions-and-macros/extensions/generate-rp-connect-info'
   - require: '@redpanda-data/docs-extensions-and-macros/extensions/unpublish-pages'
+  - require: '@redpanda-data/docs-extensions-and-macros/extensions/collect-bloblang-samples'
   - require: '@redpanda-data/docs-extensions-and-macros/extensions/generate-rp-connect-categories'
   - require: '@redpanda-data/docs-extensions-and-macros/extensions/modify-redirects'
   - require: '@redpanda-data/docs-extensions-and-macros/extensions/unlisted-pages'