clarify options for tracing

Co-authored-by: Chris Smowton <[email protected]>

Author: ethanpalm

docs/codeql/codeql-cli/creating-codeql-databases.rst

@@ -171,8 +171,9 @@ build steps, you may need to explicitly define each step in the command line.
 
    The Go autobuilder attempts to automatically detect Go code in a repository,
    and only runs build scripts in an attempt to fetch dependencies. To force
-   CodeQL to use your build script, set the environment variable
-   `CODEQL_EXTRACTOR_GO_BUILD_TRACING=on` or use the ``--command`` option.
+   CodeQL to limit extraction to the files compiled by your build script, set the environment variable
+   `CODEQL_EXTRACTOR_GO_BUILD_TRACING=on` or use the ``--command`` option to specify a
+   build command.
 
 Specifying build commands
 ~~~~~~~~~~~~~~~~~~~~~~~~~