Bump version to 2.28.0

Executed ./scripts/bump_version.sh --version 2.28.0 --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 2740479..b1a92b2 100644
--- a/include/mbedtls/version.h
+++ b/include/mbedtls/version.h
@@ -37,7 +37,7 @@
  * Major, Minor, Patchlevel
  */
 #define MBEDTLS_VERSION_MAJOR  2
-#define MBEDTLS_VERSION_MINOR  27
+#define MBEDTLS_VERSION_MINOR  28
 #define MBEDTLS_VERSION_PATCH  0
 
 /**
@@ -45,9 +45,9 @@
  *    MMNNPP00
  *    Major version | Minor version | Patch version
  */
-#define MBEDTLS_VERSION_NUMBER         0x021B0000
-#define MBEDTLS_VERSION_STRING         "2.27.0"
-#define MBEDTLS_VERSION_STRING_FULL    "mbed TLS 2.27.0"
+#define MBEDTLS_VERSION_NUMBER         0x021C0000
+#define MBEDTLS_VERSION_STRING         "2.28.0"
+#define MBEDTLS_VERSION_STRING_FULL    "mbed TLS 2.28.0"
 
 #if defined(MBEDTLS_VERSION_C)