Downgrade sentry-sdk To 1.9.8

Sentry 1.9.9 seems to be highly broken, with issues such as not being
able to install on python 3.9, and more relevantly to this project major
performance slowdowns on certain requests.

Signed-off-by: Hassan Abouelela <[email protected]>

Author: HassanAbouelela

poetry.lock

@@ -17,7 +17,7 @@ whitenoise = "6.2.0"
 httpx = "0.23.0"
 pyyaml = "6.0"
 gunicorn = "20.1.0"
-sentry-sdk = "1.9.9"
+sentry-sdk = "1.9.8"
 markdown = "3.4.1"
 python-frontmatter = "1.0.0"
 django-prometheus = "2.2.0"