Pin pytest-playwright and playwright version

This should prevent `Looks like Playwright was just updated to XXXXX`
error messages

docker/test-runner.Dockerfile

@@ -3,7 +3,7 @@ ARG PYTHON_VERSION=3.9
 FROM mcr.microsoft.com/playwright/python:v1.49.0-noble
 ARG PYTHON_VERSION
 
-RUN python3 -m pip install pytest pytest-playwright
+RUN python3 -m pip install pytest pytest-playwright==0.6.2 playwright==1.49.0
 
 RUN install -m 0755 -d /etc/apt/keyrings
 RUN curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
@@ -26,4 +26,4 @@ COPY integration_tests/ /source/integration_tests/
 WORKDIR /source
 
 ENTRYPOINT [ "python3", "-m", "pytest", "--verbose"]
-CMD [ "integration_tests/live/" ]
+CMD [ "integration_tests/live/" ]