Update s2 config to save memory as per coderabbitai

Author: AdrianSoundy

targets/ESP32/_IDF/sdkconfig.default.esp32s2

@@ -61,7 +61,7 @@ CONFIG_LWIP_SNTP_MAX_SERVERS=2
 
 CONFIG_MBEDTLS_DEFAULT_MEM_ALLOC=y
 CONFIG_MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH=y
-CONFIG_MBEDTLS_SSL_KEEP_PEER_CERTIFICATE=y
+CONFIG_MBEDTLS_SSL_KEEP_PEER_CERTIFICATE=n
 CONFIG_MBEDTLS_CERTIFICATE_BUNDLE=n
 CONFIG_MBEDTLS_HAVE_TIME_DATE=y
 CONFIG_MBEDTLS_SSL_PROTO_DTLS=y