Merge pull request #66047 from krunaljain/bugfix/csi_default_fs_type

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Fixing comments in types.go to describe the changes for CSI driver default FS type override fix

This PR fixes the comment in types.go which was made in the commit 5dfe7b5758 
In the above commit,  the change that fixed the override of default FSType for CSI driver was made. However the comments in types.go were made for   GCEPersistentDiskVolumeSource and RBDVolumeSource respectively. This commit fixes that comment to reflect the changes for CSI driver

```release-note
none
```

docs/api-reference/batch/v1beta1/definitions.html

@@ -3820,7 +3820,7 @@ Examples:<br>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock">fsType</p></td>
-<td class="tableblock halign-left valign-top"><p class="tableblock">Filesystem type of the volume that you want to mount. Tip: Ensure that the filesystem type is supported by the host operating system. Examples: "ext4", "xfs", "ntfs". More info: <a href="https://kubernetes.io/docs/concepts/storage/volumes#rbd">https://kubernetes.io/docs/concepts/storage/volumes#rbd</a></p></td>
+<td class="tableblock halign-left valign-top"><p class="tableblock">Filesystem type of the volume that you want to mount. Tip: Ensure that the filesystem type is supported by the host operating system. Examples: "ext4", "xfs", "ntfs". Implicitly inferred to be "ext4" if unspecified. More info: <a href="https://kubernetes.io/docs/concepts/storage/volumes#rbd">https://kubernetes.io/docs/concepts/storage/volumes#rbd</a></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">string</p></td>
 <td class="tableblock halign-left valign-top"></td>