Change 1 to 36, add workflow command

Author: user202729

.github/workflows/check-latex-build.sh

@@ -1,8 +1,9 @@
 #!/bin/sh
-expected_num_errors=1
+expected_num_errors=36
 
 cd builddir/src/doc/latex
 echo "All missing character error messages in LaTeX log files:"
 num_errors=$(grep -r "Missing character" --include "*.log" | tee /dev/stderr | wc -l)
 echo "In total there are $num_errors missing character errors, expecting $expected_num_errors"
+[ $num_errors = $expected_num_errors ] || echo "::error title=Missing character errors introduced in PDF build::In total there are $num_errors missing character errors, expecting $expected_num_errors"
 [ $num_errors = $expected_num_errors ]