CI: github actions: update LibreSSL to 3.5.2

LibreSSL-3.5.2 was released on Apr 23nd 2022, let us switch to it

(cherry picked from commit c89dec3dc87520b8b2644db03d53e66d69b37aa0)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 4b37a9195a00e27fb133a4fc8c8d43adb1e09b1f)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
diff --git a/.github/matrix.py b/.github/matrix.py
index e835e46..8e7130f 100644
--- a/.github/matrix.py
+++ b/.github/matrix.py
@@ -110,7 +110,7 @@
         "OPENSSL_VERSION=1.0.2u",
         "OPENSSL_VERSION=3.0.2",
         "LIBRESSL_VERSION=2.9.2",
-        "LIBRESSL_VERSION=3.5.1",
+        "LIBRESSL_VERSION=3.5.2",
 #        "BORINGSSL=yes",
     ]:
         flags = ["USE_OPENSSL=1"]