Use PSModule media icons in v2 headers

Replace text/emoji v2 numeric column headers with icon-only images from PSModule/.github media and include alt/title text for accessibility.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: MariusStorhaug

.github/actions/update-index/templates/module-catalog/v2-table.html

@@ -2,10 +2,10 @@
 <table>
     <tr>
         <th width="24%">Name</th>
-        <th width="12%">🏷️ Version</th>
-        <th width="24%">⚙️ ProcessVersion</th>
-        <th width="10%">❗ Issues</th>
-        <th width="10%">🔀 PRs</th>
-        <th width="10%">⭐ Stars</th>
+        <th width="12%"><img src="https://raw.githubusercontent.com/PSModule/.github/main/media/githubtags.svg" alt="Version" title="Version" width="16" height="16"></th>
+        <th width="24%"><img src="https://raw.githubusercontent.com/PSModule/.github/main/media/package-variant-closed-check.svg" alt="Process version" title="Process version" width="16" height="16"></th>
+        <th width="10%"><img src="https://raw.githubusercontent.com/PSModule/.github/main/media/githubissues.svg" alt="Issues" title="Issues" width="16" height="16"></th>
+        <th width="10%"><img src="https://raw.githubusercontent.com/PSModule/.github/main/media/githubpullrequests.svg" alt="Pull requests" title="Pull requests" width="16" height="16"></th>
+        <th width="10%"><img src="https://raw.githubusercontent.com/PSModule/.github/main/media/githubstars.svg" alt="Stars" title="Stars" width="16" height="16"></th>
     </tr>
 {{ ROWS }}</table>