Add info about venom and case sensitivity

See ovh/venom#570
See https://github.com/ovh/venom/releases/tag/v1.2.0

README.md

@@ -68,4 +68,8 @@ This [section](https://github.com/ovh/venom#export-tests-report) of the venom do
 
 The python script [test_suite_mock.py](test_suite_mock.py) provides a mock endpoint returning an HTTP response, for which, all HTTP response headers recommended by the [OSHP](https://owasp.org/www-project-secure-headers/) will be set.
 
-📦 It is automatically deployed on `https://oshp-validator-mock.onrender.com` and it is used, by this [CI workflow](.github/workflows/validate-tests-suite.yml), to test the venom tests suite.
+📦 It is automatically deployed on `https://oshp-validator-mock.onrender.com` and it is used, by this [CI workflow](.github/workflows/validate-tests-suite.yml), to test the venom tests suite.
+
+# Case sensitivity for header names in Venom
+
+📖 See [here](https://github.com/ovh/venom/pull/570) from the version [1.2.0](https://github.com/ovh/venom/releases/tag/v1.2.0).