Add apt install graphviz to build.yml, sudo

Author: kmatch98

.github/workflows/build.yml

@@ -47,7 +47,7 @@ jobs:
         pip install --force-reinstall pylint Sphinx sphinx-rtd-theme pre-commit
     - name: Load graphviz
       run: |
-        apt install graphviz
+        sudo apt install graphviz
     - name: Library version
       run: git describe --dirty --always --tags
     - name: Pre-commit hooks