[llvm-exegesis] Fix doc in r342947.

llvm-exegesis.rst was using invalid indentation for bullet points.

llvm-svn: 342948

llvm/docs/CommandGuide/llvm-exegesis.rst

@@ -93,6 +93,7 @@ Real-life code snippets typically depend on registers or memory.
 :program:`llvm-exegesis` checks the liveliness of registers (i.e. any register
 use has a corresponding def or is a "live in"). If your code depends on the
 value of some registers, you have two options:
+
 - Mark the register as requiring a definition. :program:`llvm-exegesis` will
   automatically assign a value to the register. This can be done using the
   directive `LLVM-EXEGESIS-DEFREG <reg name> <hex_value>`, where `<hex_value>`