install marp first

Author: connortsui20

.github/workflows/render_slides.yml

@@ -11,6 +11,9 @@ jobs:
         steps:
             - uses: actions/checkout@v1
 
+            - name: Install Marp
+              run: /home/linuxbrew/.linuxbrew/bin/brew install marp-cli
+
             - name: Pull changes from main
               run: git pull origin main