Bump version

./scripts/bump_version.sh --version 2.28.6 --so-crypto 7 --so-x509 1 --so-tls 14

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/include/mbedtls/version.h b/include/mbedtls/version.h
index 21348d2..ae91a09 100644
--- a/include/mbedtls/version.h
+++ b/include/mbedtls/version.h
@@ -26,16 +26,16 @@
  */
 #define MBEDTLS_VERSION_MAJOR  2
 #define MBEDTLS_VERSION_MINOR  28
-#define MBEDTLS_VERSION_PATCH  5
+#define MBEDTLS_VERSION_PATCH  6
 
 /**
  * The single version number has the following structure:
  *    MMNNPP00
  *    Major version | Minor version | Patch version
  */
-#define MBEDTLS_VERSION_NUMBER         0x021C0500
-#define MBEDTLS_VERSION_STRING         "2.28.5"
-#define MBEDTLS_VERSION_STRING_FULL    "Mbed TLS 2.28.5"
+#define MBEDTLS_VERSION_NUMBER         0x021C0600
+#define MBEDTLS_VERSION_STRING         "2.28.6"
+#define MBEDTLS_VERSION_STRING_FULL    "Mbed TLS 2.28.6"
 
 #if defined(MBEDTLS_VERSION_C)