[ci/linux] Enable write permission

This is needed to create new releases.
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index c54b277..b30ac6d 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -8,7 +8,7 @@
     branches: [ main ]
 
 permissions:
-  contents: read
+  contents: write
 
 jobs:
   build: