docs(sample): clean up README for native image sample (#808)

Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:
- [ ] Make sure to open an issue as a [bug/issue](https://github.com/googleapis/java-trace/issues/new/choose) before writing your code!  That way we can discuss the change, evaluate designs, and agree on the general idea
- [ ] Ensure the tests and linter pass
- [ ] Code coverage does not decrease (if any source code was changed)
- [ ] Appropriate docs were updated (if necessary)

Fixes #<issue_number_goes_here> ☕️

If you write sample code, please follow the [samples format](
https://github.com/GoogleCloudPlatform/java-docs-samples/blob/main/SAMPLE_FORMAT.md).

java-trace/samples/native-image-sample/README.md

@@ -20,25 +20,25 @@ You will need to follow these prerequisite steps in order to run these samples:
 
    **Note:** Authenticating with Application Default Credentials is convenient to use during development, but we recommend [alternate methods of authentication](https://cloud.google.com/docs/authentication/production) during production use.
 
-3. Install the GraalVM compiler.
+3. Install the native image compiler.
 
-   You can follow the [official installation instructions](https://www.graalvm.org/docs/getting-started/#install-graalvm) from the GraalVM website.
+   You can follow the [official installation instructions](https://www.graalvm.org/docs/getting-started/#install-graalvm).
    After following the instructions, ensure that you install the Native Image extension installed by running:
 
     ```
     gu install native-image
     ```
 
-   Once you finish following the instructions, verify that the default version of Java is set to the GraalVM version by running `java -version` in a terminal.
+   Once you finish following the instructions, verify that the default version of Java is set to the correct version by running `java -version` in a terminal.
 
    You will see something similar to the below output:
 
     ```
     $ java -version
    
-    openjdk version "11.0.7" 2020-04-14
-    OpenJDK Runtime Environment GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02)
-    OpenJDK 64-Bit Server VM GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02, mixed mode, sharing)
+    openjdk version "17.0.3" 2022-04-19
+    OpenJDK Runtime Environment GraalVM CE 22.1.0 (build 17.0.3+7-jvmci-22.1-b06)
+    OpenJDK 64-Bit Server VM GraalVM CE 22.1.0 (build 17.0.3+7-jvmci-22.1-b06, mixed mode, sharing)
     ```
 
 4. Enable the [Cloud Trace APIs](https://console.cloud.google.com/apis/api/cloudtrace.googleapis.com/overview).