fix: Fix spark docs (#2382)

* Fix spark docs

Signed-off-by: Kevin Zhang <kzhang@tecton.ai>

* Fix readme.md

Signed-off-by: Kevin Zhang <kzhang@tecton.ai>

* Fix md

Signed-off-by: Kevin Zhang <kzhang@tecton.ai>

Co-authored-by: Danny Chiao <danny@tecton.ai>
(cherry picked from commit d4a606a)

Author: kevjumba

docs/SUMMARY.md

@@ -60,11 +60,13 @@
   * [Snowflake](reference/data-sources/snowflake.md)
   * [BigQuery](reference/data-sources/bigquery.md)
   * [Redshift](reference/data-sources/redshift.md)
+  * [Spark](reference/data-sources/spark.md)
 * [Offline stores](reference/offline-stores/README.md)
   * [File](reference/offline-stores/file.md)
   * [Snowflake](reference/offline-stores/snowflake.md)
   * [BigQuery](reference/offline-stores/bigquery.md)
   * [Redshift](reference/offline-stores/redshift.md)
+  * [Spark](reference/offline-stores/spark.md)
 * [Online stores](reference/online-stores/README.md)
   * [SQLite](reference/online-stores/sqlite.md)
   * [Redis](reference/online-stores/redis.md)

docs/getting-started/architecture-and-components/README.md

@@ -4,7 +4,7 @@
 
 {% page-ref page="feature-repository.md" %}
 
-{% page-ref page="untitled.md" %}
+{% page-ref page="registry.md" %}
 
 {% page-ref page="offline-store.md" %}