Fix YAML formatting in GitHub Actions workflow

Author: csharpfritz

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
           echo "deb http://archive.ubuntu.com/ubuntu jammy main restricted universe multiverse" | sudo tee /etc/apt/sources.list
           sudo apt-get update
           sudo apt-get install aptitude
-          sudo aptitude install libwebp-dev
+          sudo aptitude install -y libwebp-dev
           sudo apt-get install -y  libvips-dev build-essential libcairo2-dev libpango1.0-dev libjpeg-dev libgif-dev librsvg2-dev
       - name: Build Site
         run: |
@@ -83,3 +83,4 @@ jobs:
 
 
 
+