Install imagemagick

Author: mreid-tt

Diff for: .github/workflows/build.yml

@@ -31,6 +31,8 @@ jobs:
         with:
           path: .venv
           key: venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/pyproject.toml') }}
+      - name: Install imagemagick
+        run: sudo apt install imagemagick
       - name: Install dependencies
         if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
         run: poetry install --no-interaction --no-root