Update workflows

.github/workflows/update-latex-math.yaml

@@ -27,10 +27,12 @@ jobs:
       # 1. Delete latex-math contents in the current lecture to make sure that outdated files are removed
       #     (example: there was an iml.tex that was superseded by ml-interpretable.tex)
       # 2. Download latex-math from the canonical repo into ./latex-math
+      # 3. Delete latex-math.pdf to avoid dragging large binary blobs through the git history
       - name: Get latex-math
         run: |
           rm -rf latex-math/*
           curl -sL https://api.github.com/repos/slds-lmu/latex-math/tarball/master | tar -xz --directory=latex-math/ --strip-components=1
+          rm latex-math/latex-math.pdf
 
       # Use this pull request action to auto-generate a PR with the changes
       # See https://github.com/peter-evans/create-pull-request#action-inputs