fix test

Author: aphralG

test/integration/installuninstall/install_uninstall_test.go

@@ -154,7 +154,7 @@ func verifyAgentVersion(ctx context.Context, tb testing.TB, testContainer testco
 
 	replacer := strings.NewReplacer("nginx-agent-", "v", "SNAPSHOT-", "")
 	packageVersion := replacer.Replace(os.Getenv("PACKAGE_NAME"))
-	expectedVersionOutput := "nginx-agent version" + packageVersion
+	expectedVersionOutput := "nginx-agent version " + packageVersion
 
 	exitCode, cmdOut, err := testContainer.Exec(ctx, []string{"nginx-agent", "--version"})
 	require.NoError(tb, err)