Update product-usage-reporting.mdx (#1158)

Fixing some minor issues with formatting

Author: finnstech

content/vault/v1.21.x (rc)/content/docs/license/product-usage-reporting.mdx

@@ -254,8 +254,8 @@ All of these metrics are numerical, and contain no sensitive values or additiona
 | `vault.autosnapshots.google-gcs.count`                              | The total of automated snapshot configurations with storage type Google GCS.                                     |
 | `vault.autosnapshots.aws-s3.count`                                  | The total number of automated snapshot configurations with storage type AWS S3.                                  |
 | `vault.autosnapshots.azure-blob.count`                              | The total number of automated snapshot configurations with storage type Azure Blob.                              |
-| `vault.pki.cert.stored.count.current_month                          | The number of certificates stored in built-in PKI backends in the current month.                                 |
-| `vault.pki.cert.stored.count.previous_month                         | The number of certificates stored in built-in PKI backends in the previous month.                                |
+| `vault.pki.cert.stored.count.current_month`                         | The number of certificates stored in built-in PKI backends in the current month.                                 |
+| `vault.pki.cert.stored.count.previous_month`                        | The number of certificates stored in built-in PKI backends in the previous month.                                |
 
 ## Usage metadata list