### Environment

* Dubbo version: 3.2.0
* Operating System version: macos10.15.7
* Java version: 1.8

### Steps to reproduce this issue

### Expected Behavior

set http2Disable default value into http2Disable.

```java
public class KubernetesConfigUtils {
    public static Config createKubernetesConfig(URL url) {
        Config base = Config.autoConfigure(null);
        return new ConfigBuilder(base) //
                 // ...
                .withTrustCerts(url.getParameter(TRUST_CERTS, base.isTrustCerts())) //
                .withHttp2Disable(url.getParameter(HTTP2_DISABLE, base.isHttp2Disable())) // 
                .build();
    }
}
```

### Actual Behavior

set trustCerts default value into http2Disable.

```java
public class KubernetesConfigUtils {
    public static Config createKubernetesConfig(URL url) {
        Config base = Config.autoConfigure(null);
        return new ConfigBuilder(base) //
                 // ...
                .withTrustCerts(url.getParameter(TRUST_CERTS, base.isTrustCerts())) //
                .withHttp2Disable(url.getParameter(HTTP2_DISABLE, base.isTrustCerts())) // bug
                .build();
    }
}
```

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package org.apache.dubbo.registry.kubernetes.util;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.utils.StringUtils;
import io.fabric8.kubernetes.client.Config;
import io.fabric8.kubernetes.client.ConfigBuilder;