[red] Guard capability-defined firmware target wording

Signed-off-by: Viwat Vchirawongkwin <viwat.v@chula.ac.th>

Author: yyods

tests/publication/test_public_claims.py

@@ -281,6 +281,7 @@ def test_public_specifications_describe_the_exact_beta_without_overclaim(
             "installer without claiming that release artifacts are ready",
             "stages the future browser firmware installer",
             "before the current public installer can be enabled",
+            "the first validated firmware family",
         ):
             self.assertNotIn(stale_claim, combined)