Clarify that dependency caching is only possible for GH runners (#55182)

Co-authored-by: Michael B. Gale <[email protected]>

Author: felickz

Diff for: content/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages.md

@@ -137,7 +137,7 @@ Dependency caching works with all build modes, and is supported by {% data varia
 
 ### Enabling dependency caching for {% data variables.product.prodname_codeql %}
 
-For default setup workflows, dependency caching is enabled by default for {% data variables.product.github %}-hosted runners in public and private repositories.
+For default setup workflows, dependency caching is enabled only for {% data variables.product.github %}-hosted runners in public and private repositories.
 
 For advanced setup workflows, dependency caching is disabled by default. To enable dependency caching for {% data variables.product.prodname_codeql %}, use the `dependency-caching` setting for the {% data variables.product.prodname_codeql %} action in your advanced setup workflow. This setting accepts the following values: