Fix empty bibliography by installing texlive-binaries in CI

Doxygen uses bib2xhtml.pl which shells out to bibtex to format the
bibliography. Without bibtex installed, citelist.html is empty and
all \cite references render as plain text. Also removes duplicate
graphviz entry.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: sbryngelson

.github/workflows/docs.yml

@@ -21,7 +21,7 @@ jobs:
     - name: Build Doxygen
       run:  |
         sudo apt update -y
-        sudo apt install -y cmake ninja-build graphviz graphviz
+        sudo apt install -y cmake ninja-build graphviz texlive-binaries
         git clone https://github.com/doxygen/doxygen.git ../doxygen
         cd ../doxygen
         git checkout Release_1_16_1