message: Fix typo spotted by Jay
diff: @@ -116,7 +116,7 @@ Both approaches register their RPC's params and result schema, allowing them to
  Build
  -----
  -Once an application is complete, it needs be built into a shared object, and signed:
  +Once an application is complete, it needs to be built into a shared object, and signed:
  .. literalinclude:: ../../../CMakeLists.txt
  :language: cmake
  