install marp first

Author: connortsui20

.github/workflows/render_slides.yml

@@ -9,7 +9,10 @@ jobs:
     render:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v1
+            - uses: actions/checkout@v4
+
+            - name: Install Marp
+              run: /home/linuxbrew/.linuxbrew/bin/brew install marp-cli
 
             - name: Pull changes from main
               run: git pull origin main