Upgrade tectonic to 0.9.0 and biber to 2.14

dockerfiles/latex-builder/Dockerfile

@@ -15,7 +15,9 @@ ARG CONDA_PREFIX=/opt/conda
 # thereby increasing continuous integration speed.
 COPY example.tex /root/example.tex
 
-RUN ${CONDA_PREFIX}/bin/mamba install "tectonic==0.1.15" texlive-core "malramsay::biber==2.11" \
+# Biber and tectonic need to have matching versions, so it is not feasible to
+# release the pin on either of them.
+RUN ${CONDA_PREFIX}/bin/mamba install "tectonic==0.9.0" texlive-core "malramsay::biber==2.14" \
     && ${CONDA_PREFIX}/bin/tectonic /root/example.tex \
     && curl -o /usr/local/bin/git-latexdiff https://gitlab.com/git-latexdiff/git-latexdiff/-/raw/1.6.0/git-latexdiff \
     && chmod +x /usr/local/bin/git-latexdiff