Potential fix for code scanning alert no. 999: 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: AU_gdev_19 <64915515+Dargon789@users.noreply.github.com>

Author: Dargon789

.github/workflows/vm-build.yml

@@ -1,4 +1,6 @@
 name: VM
+permissions:
+  contents: read
 on:
   pull_request:
     types: [opened, reopened, synchronize]