Bump this way up and see if it helps (#4713)

docs/conf.py

diff --git a/docs/conf.py b/docs/conf.py
index 39fa4f1..b152bf1 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -176,7 +176,7 @@
 
 # Retry requests in the linkcheck builder so that we're resillient against
 # transient network errors.
-linkcheck_retries = 5
+linkcheck_retries = 10
 
 linkcheck_ignore = [
     # Small DH key results in a TLS failure on modern OpenSSL