Restore bump version

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cbe5748..36baa3b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -377,7 +377,7 @@
     write_basic_package_version_file(
         "cmake/MbedTLSConfigVersion.cmake"
             COMPATIBILITY SameMajorVersion
-            VERSION 3.5.0)
+            VERSION 3.5.1)
 
     install(
         FILES "${CMAKE_CURRENT_BINARY_DIR}/cmake/MbedTLSConfig.cmake"