fix(api/Dockerfile): bump cryptography to 3.4.8

api/Dockerfile

@@ -50,9 +50,9 @@ RUN \
     pip3 install setuptools wheel && \
     # Currently we are unable to relieably build cryptography on armv7. This
     # is why we need to use the package shipped by Alpine Linux, which is currently
-    # version 3.3.2. Since poetry does not allow in-place dependency pinning, we need
+    # version 3.4.8. Since poetry does not allow in-place dependency pinning, we need
     # to install the deps using pip.
-    cat /requirements.txt | grep -Ev 'cryptography|autobahn' | pip3 install -r /dev/stdin cryptography==3.3.2 autobahn==21.2.1 && \
+    cat /requirements.txt | grep -Ev 'cryptography|autobahn' | pip3 install -r /dev/stdin cryptography==3.4.8 autobahn==21.2.1 && \
     rm -rf $PIP_DOWNLOAD_CACHE
 
 ARG install_dev_deps=0