Fix rich-codex version

Author: Buried-In-Code

.github/workflows/rich-codex.yaml

@@ -24,7 +24,7 @@ jobs:
       - name: Install project
         run: uv sync --locked --no-dev
       - name: Generate terminal images with rich-codex
-        uses: ewels/rich-codex@latest
+        uses: ewels/rich-codex@v1.2.11
         with:
           commit_changes: true
           clean_img_paths: docs/img/*.svg