Clarify 'actual'/'written' in submodule_versions error message (#2957)

diff --git a/scripts/git/submodule_versions.py b/scripts/git/submodule_versions.py
index e3859b9..1bfe5c5 100755
--- a/scripts/git/submodule_versions.py
+++ b/scripts/git/submodule_versions.py
@@ -132,10 +132,10 @@
         "Submodule state differs from SUBMODULE_VERSIONS file. Run (and commit) one of:"
     )
     print(
-        "  ./scripts/git/submodule_versions.py import # Use version in SUBMODULE_VERSIONS"
+        "  ./scripts/git/submodule_versions.py import # Use version in SUBMODULE_VERSIONS ('written')"
     )
     print(
-        "  ./scripts/git/submodule_versions.py export # Use version in git state"
+        "  ./scripts/git/submodule_versions.py export # Use version in git state ('actual')"
     )
     for k, (current, written) in diff_versions.items():
       print("%s : actual=%s written=%s" % (k, current, written))