[MINOR][DOC] Fix 2 style issues in running-on-kubernetes doc

### What changes were proposed in this pull request?

fix style issue in the k8s document, please go to http://spark.apache.org/docs/3.0.0-preview2/running-on-kubernetes.html and search the keyword`spark.kubernetes.file.upload.path` to jump to the error context

### Why are the changes needed?

doc correctness

### Does this PR introduce any user-facing change?

Nah
### How was this patch tested?

Nah

Closes #27582 from yaooqinn/k8s-doc.

Authored-by: Kent Yao <[email protected]>
Signed-off-by: HyukjinKwon <[email protected]>

Author: yaooqinn

docs/running-on-kubernetes.md

@@ -1120,7 +1120,7 @@ See the [configuration page](configuration.html) for information on Spark config
   <td>(none)</td>
   <td>
     Path to store files at the spark submit side in cluster mode. For example:
-    <code>spark.kubernetes.file.upload.path=s3a://<s3-bucket>/path</code>
+    <code>spark.kubernetes.file.upload.path=s3a://&lt;s3-bucket&gt;/path</code>
     File should specified as <code>file://path/to/file </code> or absolute path.
   </td>
 </tr>
@@ -1247,7 +1247,7 @@ The following affect the driver and executor containers. All other containers in
 </tr>
 <tr>
   <td>name</td>
-  <td>See description.</code></td>
+  <td>See description</td>
   <td>
     The container name will be assigned by spark ("spark-kubernetes-driver" for the driver container, and
     "executor" for each executor container) if not defined by the pod template. If the container is defined by the