Potential fix for code scanning alert no. 67: Workflow does not contain permissions

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
Signed-off-by: Dargon789 <64915515+Dargon789@users.noreply.github.com>

Author: Dargon789

.github/workflows/tx-build.yml

@@ -1,4 +1,6 @@
 name: Tx
+permissions:
+  contents: read
 on:
   push:
     branches: [master, develop]