Link checker: Start ignoring example.org due to certificate errors

[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed:
unable to get local issuer certificate (_ssl.c:1081)

Author: amotl

src/crate/theme/rtd/conf/__init__.py

@@ -175,6 +175,10 @@
     "https://www.gnu.org/.*",
     # Temporary failure in name resolution
     "https://jupysql.ploomber.io/.*",
+    # Sporadic CERTIFICATE_VERIFY_FAILED errors.
+    # https://github.com/crate/crate-docs-theme/issues/706
+    "https://example.org",
+    "https://www.example.org",
 ]
 linkcheck_anchors_ignore_for_url = [
     # Requires JavaScript.