Fix workflow ability to upload artifacts

Add content write permission to AppImage, macOS, and Windows workflows.

.github/workflows/appimage.yml

@@ -20,6 +20,8 @@ env:
 jobs:
   build:
     runs-on: ubuntu-20.04
+    permissions:
+      contents: write
     strategy:
       fail-fast: false
       matrix:

.github/workflows/macos.yml

@@ -17,6 +17,8 @@ on:
 jobs:
   build:
     runs-on: macos-13
+    permissions:
+      contents: write
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4

.github/workflows/windows.yml

@@ -21,6 +21,8 @@ env:
 jobs:
   build:
     runs-on: windows-latest
+    permissions:
+      contents: write
     defaults:
       run:
         shell: msys2 {0}