tiered-storage: remove SI references (#1324)

Author: paulohtb6

modules/deploy/partials/high-availability.adoc

@@ -534,4 +534,4 @@ include::shared:partial$suggested-reading.adoc[]
 * https://redpanda.com/blog/redpanda-official-jepsen-report-and-analysis?utm_assettype=report&utm_assetname=roi_report&utm_source=gated_content&utm_medium=content&utm_campaign=jepsen_blog[Redpanda's official Jepsen report^]
 * https://redpanda.com/blog/simplifying-raft-replication-in-redpanda[Simplifying Redpanda Raft implementation^]
 * https://redpanda.com/blog/kafka-redpanda-availability[An availability footprint of the Redpanda and Apache Kafka replication protocols^]
-* https://redpanda.com/blog/tiered-storage-architecture-shadow-indexing-deep-dive[How we built shadow indexing^]
+* https://www.redpanda.com/blog/tiered-storage-architecture-deep-dive[How we built Tiered Storage to supercharge storage and data streaming^]

modules/manage/partials/tiered-storage.adoc

@@ -1928,4 +1928,4 @@ The interval, in milliseconds, to reconcile partitions that need to be uploaded.
 
 include::shared:partial$suggested-reading.adoc[]
 
-- https://redpanda.com/blog/tiered-storage-architecture-shadow-indexing-deep-dive/[How we built Shadow Indexing, the subsystem powering Tiered Storage^]
+- https://www.redpanda.com/blog/tiered-storage-architecture-deep-dive[How we built Tiered Storage to supercharge storage and data streaming^]