Add examples of both tracing mechanisms

Author: ethanpalm

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

@@ -202,9 +202,12 @@ commands that you can specify for compiled languages.
 
      codeql database create csharp-database --language=csharp --command='dotnet build /p:UseSharedCompilation=false /t:rebuild'
 
+- Go project built using the ``COEQL_EXTRACTOR_GO_BUILD_TRACING=on`` environment variable::
+   CODEQL_EXTRACTOR_GO_BUILD_TRACING=on codeql database create go-database --language=go
+
 - Go project built using a custom build script::
 
-   CODEQL_EXTRACTOR_GO_BUILD_TRACING=on codeql database create go-database --language=go --command='./scripts/build.sh'
+   codeql database create go-database --language=go --command='./scripts/build.sh'
 
 - Java project built using Gradle::