chore: rename meta data to metadata (#11322)

# Which Problems Are Solved

Inconsistent naming: https://github.com/zitadel/zitadel/issues/11294


# How the Problems Are Solved


# Additional Changes


# Additional Context

- Closes #11294

docs/docs/legal/_piid-table.mdx

@@ -76,7 +76,7 @@
     </td>
   </tr>
   <tr>
-    <td><strong>Usage meta data</strong></td>
+    <td><strong>Usage metadata</strong></td>
     <td>
       <ul>
         <li>User agent</li>

docs/src/components/pii_table.jsx

@@ -69,7 +69,7 @@ export function PiiTable() {
       subjects: "Customers who use our services."
     },
     {
-      type: "Usage meta data",
+      type: "Usage metadata",
       examples: [
         'User agent',
         'IP addresses',