fix workflow permissions (#194)

<!-- markdownlint-disable MD041 -->
#### What this PR does / why we need it

#### Which issue(s) this PR is related to
<!--
Usage: `Related to #<issue number>`, or `Related to (paste link of
issue)`.
-->

Signed-off-by: Frederic Wilhelm <[email protected]>

Author: frewilhelm

.github/workflows/test.yml

@@ -1,4 +1,6 @@
 name: Test
+permissions:
+    contents: read
 
 on:
   push: