chore(deps): update lobehub/lobe-chat docker tag to v1.26.18 (#2421)

* chore(deps): update lobehub/lobe-chat docker tag to v1.26.18

* Update app version [skip ci]

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: github-action update-app-version <githubaction@githubaction.com>

lobe-chat/1.26.18/docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   lobe-chat:
-    image: lobehub/lobe-chat:v1.26.17
+    image: lobehub/lobe-chat:v1.26.18
     container_name: ${CONTAINER_NAME}
     restart: always
     networks: