[Backport 5.0] add items to 5.0.1 changelog (#50408)

Adding 5.0.1 patch items to changelog.

## Test plan

N/A

<!-- All pull requests REQUIRE a test plan:
https://docs.sourcegraph.com/dev/background-information/testing_principles
-->
 <br> Backport 01f87ca from #50390

---------

Co-authored-by: coury-clark <[email protected]>

CHANGELOG.md

@@ -25,13 +25,42 @@ All notable changes to Sourcegraph are documented in this file.
 
 ### Fixed
 
-- Fixed an issue where search based references were not displayed in the references panel. [#50157](https://github.com/sourcegraph/sourcegraph/pull/50157)
-- Fixed an issue where Slack code monitoring notifications failed when the message was too long. [#50083](https://github.com/sourcegraph/sourcegraph/pull/50083)
+-
 
 ### Removed
 
 -
 
+## 5.0.1
+
+### Added
+
+- The ability to exclude certain file path patterns from embeddings.
+- Added a modal to show warnings and errors when exporting search results. [#50348](https://github.com/sourcegraph/sourcegraph/pull/50348)
+
+### Changed
+
+### Fixed
+
+- Fixed CVE-2023-0464 in container images
+- Fixed CVE-2023-24532 in container images
+- Fixed an issue where Slack code monitoring notifications failed when the message was too long. [#50083](https://github.com/sourcegraph/sourcegraph/pull/50083)
+- Fixed an edge case issue with usage statistics calculations that cross over month and year boundaries.
+- Fixed the "Last incremental sync" value in user/repo permissions from displaying a wrong date if no sync had been completed yet.
+- Fixed an issue that caused search context creation to fail with error "you must provide a first or last value to properly paginate" when defining the repositories and revisions with a JSON configuration.
+- Fixed an issue where the incorrect actor was provided when searching an embeddings index.
+- Fixed multiple requests downloading the embeddings index concurrently on an empty cache leading to an out-of-memory error.
+- Fixed the encoding of embeddings indexes which caused out-of-memory errors for large indexes when uploading them from the worker service.
+- Fixed git blame decorations styles
+- CODEOWNERS rules with consecutive slashes (`//`) will no longer fail ownership searches
+- Granting pending permissions to users when experimentalFeatures.unifiedPermissions is turned ON [#50059](https://github.com/sourcegraph/sourcegraph/pull/50059)
+- The unified permissions out of band migration reported as unfinished if there were users with no permissions [#50147](https://github.com/sourcegraph/sourcegraph/pull/50147)
+- Filenames with special characters are correctly handled in Cody's embedding service [#50023](https://github.com/sourcegraph/sourcegraph/pull/50023)
+- Structural search correctly cleans up when done preventing a goroutine leak [#50034](https://github.com/sourcegraph/sourcegraph/pull/50034)
+- Fetch search based definitions in the reference panel if no precise definitions were found [#50179](https://github.com/sourcegraph/sourcegraph/pull/50179)
+
+### Removed
+
 ## 5.0.0
 
 ### Added