Simplify warning language to not enumerate deprecated versions.

Author: mario-campos

lib/analyze-action.js

@@ -489,7 +489,7 @@ for (const [
       t.true(
         warningSpy.calledOnceWithExactly(
           sinon.match(
-            "CodeQL Action major versions v1, v2, and v3 have either been deprecated or will soon be deprecated.",
+            "CodeQL Action major versions below v4 have either been deprecated or will soon be deprecated.",
           ),
         ),
       );

lib/autobuild-action.js

@@ -1142,7 +1142,7 @@ export function checkActionVersion(
         ))
     ) {
       core.error(
-        "CodeQL Action major versions v1, v2, and v3 have either been deprecated or will soon be deprecated. " +
+        "CodeQL Action major versions below v4 have either been deprecated or will soon be deprecated. " +
           "Please update all occurrences of the CodeQL Action in your workflow files to v4. " +
           "For more information, see " +
           "https://github.blog/changelog/2025-10-28-upcoming-deprecation-of-codeql-action-v3/",