CI: Fix executable flag for cached mill script (#3912)

Pull request: #3912

.github/workflows/publish-artifacts.yml

@@ -68,6 +68,11 @@ jobs:
         with:
           path: .
 
+      # Need to fix cached artifact file permissions because github actions screws it up
+      # https://github.com/actions/upload-artifact/issues/38
+      - name: chmod executable
+        run: "chmod +x ./mill"
+
       - uses: coursier/cache-action@v6
 
       - uses: actions/setup-java@v4
@@ -91,6 +96,11 @@ jobs:
         with:
           path: .
 
+      # Need to fix cached artifact file permissions because github actions screws it up
+      # https://github.com/actions/upload-artifact/issues/38
+      - name: chmod executable
+        run: "chmod +x ./mill"
+
       - uses: coursier/cache-action@v6
 
       - uses: actions/setup-java@v4