Add curl for codecov-action

Author: jrdnbradford

.github/workflows/unit-test.yaml

@@ -53,15 +53,16 @@ jobs:
         with:
           python-version: "${{ matrix.python_version }}"
 
-      - name: Install venv, git, pip and setup venv
+      - name: Install system dependencies and setup venv
         run: |
           export DEBIAN_FRONTEND=noninteractive
           apt-get update
           apt-get install --yes \
               python3-venv \
               python3-pip \
               bzip2 \
-              git
+              git \
+              curl
 
           python3 -m venv /srv/venv
           echo '/srv/venv/bin' >> $GITHUB_PATH