Fix error in C++ use cases documentation
In the sample scenario, the legacy library includes `include/some_lib.h`, so `copts` should not add the final `include` directory to the include path.
Closes
@@ -91,8 +91,8 @@ directory structure:
Bazel will expect `some_lib.h` to be included as
`legacy/some_lib/include/some_lib.h`, but suppose `some_lib.cc` includes
-`"include/some_lib.h"`. To make that include path valid,
-`legacy/some_lib/BUILD` will need to specify that the `some_lib/`
+`"some_lib.h"`. To make that include path valid,
+`legacy/some_lib/BUILD` will need to specify that the `some_lib/include`
directory is an include directory:
```python
