As the webrtc demos have now been merged, change the paths for
easier copy-pasting.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-examples/-/merge_requests/38>
# Run the tests
-`GST_VALIDATE_APPS_DIR=/path/to/gstwebrtc-demos/check/validate/apps/ GST_VALIDATE_SCENARIOS_PATH=/path/to/gstwebrtc-demos/check/validate/scenarios/ gst-validate-launcher --testsuites-dir /path/to/gstwebrtc-demos/check/validate/testsuites/ webrtc`
+`GST_VALIDATE_APPS_DIR=/path/to/gst-examples/webrtc/check/validate/apps/ GST_VALIDATE_SCENARIOS_PATH=/path/to/gst-examples/webrtc/check/validate/scenarios/ gst-validate-launcher --testsuites-dir /path/to/gst-examples/webrtc/check/validate/testsuites/ webrtc`