ci: Use general terms for CircleCI.

GitHub Actions supports doing more than just CI,
and so in some contexts it's less obvious that we're
talking about just the CI if we refer to it instead of CircleCI.

tools/lib/provision_inner.py

@@ -296,7 +296,7 @@ def main(options: argparse.Namespace) -> int:
             run(["tools/setup/postgresql-init-dev-db"])
             if options.skip_dev_db_build:
                 # We don't need to build the manual development
-                # database on CircleCI for running tests, so we can
+                # database on continuous integration for running tests, so we can
                 # just leave it as a template db and save a minute.
                 #
                 # Important: We don't write a digest as that would