Update the Alert Digest partial template to be more concise

internal/generatedtext/render_context_test.go

@@ -91,7 +91,7 @@ func TestBuildHourlyRenderContext(t *testing.T) {
 		"**Updated:** Friday, May 29, 2026 at 8:30 AM",
 		"Storm chances increase through late morning.",
 		"- **10:00 AM:** 75°F and showers. Probability of precipitation is 70%.",
-		"- **Flood Watch**: Flood Watch in effect from May 29 at 10:00 AM to May 29 at 2:30 PM. Avoid low-water crossings.",
+		"- **Flood Watch**: Flood Watch in effect from May 29 at 10:00 AM to May 29 at 2:30 PM.",
 		"A cold front is moving into the region.",
 		"A front will keep the region unsettled.",
 	} {
@@ -99,6 +99,9 @@ func TestBuildHourlyRenderContext(t *testing.T) {
 			t.Fatalf("rendered template missing %q:\n%s", want, text)
 		}
 	}
+	if strings.Contains(text, "Avoid low-water crossings.") {
+		t.Fatalf("rendered template includes alert instruction:\n%s", text)
+	}
 }
 
 func TestBuildHourlyRenderContextAllowsOmittedOptionalModules(t *testing.T) {