Fix devcontainer: remove version pins from texlive packages

texlive packages follow the TeX Live release cycle and their Debian
package versions change frequently. Pinning to a specific version causes
the build to fail when the index is updated. Other system packages
(ccache, ruby, etc.) remain pinned as they are stable.

https://claude.ai/code/session_014hVQ5UrK1B4N9ar4UfYpm4

Author: claude

.devcontainer/Dockerfile

@@ -16,11 +16,12 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
     rm -rf /var/lib/apt/lists/*
 
 # Install LaTeX for PDF documentation generation
+# texlive packages follow the TeX Live release cycle and are not pinned
 RUN apt-get update && apt-get install --no-install-recommends -y \
-    texlive-latex-recommended=2023.20240207-1 \
-    texlive-fonts-recommended=2023.20240207-1 \
-    texlive-latex-extra=2023.20240207-1 \
-    latexmk=1:4.83-1 && \
+    texlive-latex-recommended \
+    texlive-fonts-recommended \
+    texlive-latex-extra \
+    latexmk && \
     rm -rf /var/lib/apt/lists/*
 
 # Install ruby gem FPM for packaging