Bump poetry to 1.8.5 (#543)

..in `Dockerfile` so it can process recently-generated `poetry.lock`
files. Avoid version 2 so we don't have to think too hard about this
change.

Co-authored-by: Scott Bailey <scott.bailey@godaddy.com>

Author: rbailey-godaddy

Dockerfile

@@ -7,7 +7,7 @@ FROM base as builder
 ENV PIP_DEFAULT_TIMEOUT=100 \
     PIP_DISABLE_PIP_VERSION_CHECK=1 \
     PIP_NO_CACHE_DIR=1 \
-    POETRY_VERSION=1.2.2
+    POETRY_VERSION=1.8.5
 
 RUN pip --no-cache-dir install "poetry==$POETRY_VERSION"
 RUN python -m venv /venv