message: doc: Fix typos in packages.md
diff: @@ -178,8 +178,8 @@ not sufficient to just say `libprimary`.
  For us, it's much easier to just link a static `libsecondary` into a shared
  `libprimary`. Especially because in our case, we are linking against a dummy
  `libprimary` anyway that we'll throw away. We don't care if the end-user has a
  -static or dynamic `libseconday`, that's not our concern. With a static
  -`libseconday`, when we need to link `libprimary` into our executable, there's no
  +static or dynamic `libsecondary`, that's not our concern. With a static
  +`libsecondary`, when we need to link `libprimary` into our executable, there's no
  dependency chain to worry about as `libprimary` has all the symbols.
  ## Build targets:
  