Release notes for v1.3.3

Changelog since v1.3.2

Changes by Kind

Bug or Regression

• Adds an explicit 10 second timeout when checking HTTP01 challenges for reachability (#4317, @SgtCoDFish )

Other (Cleanup or Flake)

• Clarify the exact supported kubernetes version range for cert-manager 1.3 (#4314, @SgtCoDFish)