Ignore safety alert #59473 - a bug in cryptography's handling of ssh …

…certs

(cherry picked from commit f628c33)

Makefile

@@ -175,6 +175,7 @@ safety:  ## Run `safety check` to check python dependencies for vulnerabilities.
                 --ignore 54421 \
                 --ignore 55261 \
                 --ignore 58912 \
+                --ignore 59473 \
 		--full-report -r $$req_file \
 		&& echo -e '\n' \
 		|| exit 1; \