Version bump 3.6.4

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c981ef7..c3eb9c1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,12 +40,12 @@
 if(TEST_CPP)
     project("Mbed TLS"
         LANGUAGES C CXX
-        VERSION 3.6.3
+        VERSION 3.6.4
     )
 else()
     project("Mbed TLS"
         LANGUAGES C
-        VERSION 3.6.3
+        VERSION 3.6.4
     )
 endif()
 
@@ -476,7 +476,7 @@
     write_basic_package_version_file(
         "cmake/MbedTLSConfigVersion.cmake"
             COMPATIBILITY SameMajorVersion
-            VERSION 3.6.3)
+            VERSION 3.6.4)
 
     install(
         FILES "${CMAKE_CURRENT_BINARY_DIR}/cmake/MbedTLSConfig.cmake"