make : fix incorrect indentation

This is a variable assignment, not part of one of the above rules.

Author: cebtenzzre

Makefile

@@ -320,7 +320,7 @@ k_quants.o: k_quants.c k_quants.h
 endif # LLAMA_NO_K_QUANTS
 
 ifdef LLAMA_DISABLE_LOGS
-	MK_CPPFLAGS += -DLOG_DISABLE_LOGS
+MK_CPPFLAGS += -DLOG_DISABLE_LOGS
 endif # LLAMA_DISABLE_LOGS
 
 # combine build flags with cmdline overrides