replace fixed mbedtls version with variable $MBEDTLS_VER

Author: rickyrick2002

README.md

@@ -243,7 +243,7 @@ sudo ldconfig
 
 # Installation of MbedTLS
 export MBEDTLS_VER=2.6.0
-wget https://github.com/Mbed-TLS/mbedtls/archive/refs/tags/mbedtls-2.6.0.tar.gz
+wget https://github.com/Mbed-TLS/mbedtls/archive/refs/tags/mbedtls-$MBEDTLS_VER.tar.gz
 tar xvf mbedtls-$MBEDTLS_VER.tar.gz
 pushd mbedtls-$MBEDTLS_VER
 make SHARED=1 CFLAGS="-O2 -fPIC"