Add debugging output for benchmark report extraction in CI workflow

.github/runners/runner-x64/Dockerfile

@@ -7,7 +7,7 @@ ARG DEBIAN_FRONTEND=noninteractive
 
 RUN apt update -y && apt upgrade -y && useradd -m docker
 RUN apt install -y --no-install-recommends \
-    curl jq git \
+    curl jq git unzip \
     # dev dependencies
     build-essential libssl-dev libffi-dev python3 python3-venv python3-dev python3-pip \
     # dot net core dependencies

.github/workflows/docs-and-testcov.yml

@@ -119,6 +119,8 @@ jobs:
             -o benchmark-report.zip "$artifact_url"
 
           mkdir -p benchmark-report
+          # print ls -a
+          echo "$( ls -a benchmark-report )"
           unzip benchmark-report.zip -d benchmark-report
           # there will be a tar file in the benchmark-report directory 
           # called artifact.tar. unzip it into the benchmark-report