Update README.md

3 jobs for mmsd in 48 seconds (queued for 3 seconds)
Name Stage Failure
build-debian-gcc-buster Build
to the PKG_CONFIG_PATH environment variable
No package 'libebook-contacts-1.2' found
gcc -fPIC -DPIC -Wall -g -O0 -DPURPLE_PLUGINS -c -o mm-sms.o mm-sms.c
mm-sms.c:32:10: fatal error: glib.h: No such file or directory
#include <glib.h>
compilation terminated.
make: *** [Makefile:42: mm-sms.o] Error 1
ERROR: Job failed: exit code 1