GHActions: Fix cache clean permissions

.github/workflows/linux_build_flatpak.yml

@@ -49,6 +49,9 @@ jobs:
       options: --privileged
     timeout-minutes: 60
 
+    permissions:
+      actions: write
+
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v6

.github/workflows/linux_build_qt.yml

@@ -53,6 +53,9 @@ jobs:
       CCACHE_COMPRESSLEVEL: 9
       CCACHE_MAXSIZE: 100M
 
+    permissions:
+      actions: write
+
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v6

.github/workflows/macos_build.yml

@@ -46,6 +46,9 @@ jobs:
       # Only way to use a secret in an if statement
       SIGN_KEY: ${{ secrets.APPLE_SIGN_P12_B64 }}
 
+    permissions:
+      actions: write
+
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v6