fix: GitHub sysroots url fetching

.github/workflows/build.yml

@@ -55,8 +55,8 @@ jobs:
           merge-multiple: true
       - name: Download sysroots.json from Electron
         run: |
-          json_url="https://github.com/electron/electron/blob/main/script/sysroots.json"
-          curl --output build/linux/sysroot_scripts/sysroots.json $json_url
+          json_url="https://raw.githubusercontent.com/electron/electron/main/script/sysroots.json"
+          curl --output build/linux/sysroot_scripts/sysroots.json $json_url -H "Accept: application/json"
           az extension add --name storage-preview
       - name: Upload Sysroots to Azure
         run: ./build/linux/sysroot_scripts/build_and_upload.py --upload