fix(letta_code): use 0.34.21, the newest release with a published image

Upstream tagged 0.34.22 and 0.34.23 but its release workflow failed, so
no ghcr image exists for them and the 0.34.23 build failed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

letta_code/CHANGELOG.md

@@ -1,6 +1,7 @@
  
-## 0.34.23 (2026-10-24)
+## 0.34.21 (2026-10-24)
 - Update to latest version from letta-ai/letta-code (changelog : https://github.com/letta-ai/letta-code/releases)
+- Use 0.34.21: upstream tagged 0.34.22 and 0.34.23 but their image publish failed, so `ghcr.io/letta-ai/letta-code:0.34.23` does not exist
 ## 0.34.19 (2026-10-22)
 
 - Initial release, based on upstream letta-ai/letta-code 0.34.19 (changelog: <https://github.com/letta-ai/letta-code/releases>)

letta_code/Dockerfile

@@ -16,7 +16,7 @@
 
 ARG BUILD_FROM
 ARG BUILD_VERSION
-ARG BUILD_UPSTREAM="0.34.23"
+ARG BUILD_UPSTREAM="0.34.21"
 FROM ghcr.io/letta-ai/letta-code:${BUILD_UPSTREAM}
 
 ##################

letta_code/config.yaml

@@ -27,4 +27,4 @@ schema:
   token: password?
 slug: letta_code
 url: https://github.com/alexbelgium/hassio-addons/tree/master/letta_code
-version: "0.34.23"
+version: "0.34.21"

letta_code/updater.json

@@ -6,5 +6,5 @@
   "slug": "letta_code",
   "source": "github",
   "upstream_repo": "letta-ai/letta-code",
-  "upstream_version": "0.34.23"
+  "upstream_version": "0.34.21"
 }