fixing aarch64 workflow

.github/workflows/linux-aarch64-nightly.yml

@@ -30,10 +30,19 @@ jobs:
         with:
           targets: aarch64-unknown-linux-gnu
         
-      - name: Install Linux Dependencies
+      - name: Configure ARM64 build environment
         run: |
           sudo dpkg --add-architecture arm64
+          # Remove existing sources to prevent 404 errors
+          sudo rm -f /etc/apt/sources.list.d/*.list
+          # Add ARM64 repositories from ports.ubuntu.com
+          sudo tee /etc/apt/sources.list.d/arm64.list << EOF
+          deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports jammy main restricted universe multiverse
+          deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports jammy-updates main restricted universe multiverse
+          deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports jammy-security main restricted universe multiverse
+          EOF
           sudo apt-get update
+          # Install required packages including cross-compilation tools
           sudo apt-get install -y \
             build-essential \
             pkg-config \
@@ -47,10 +56,7 @@ jobs:
             libjavascriptcoregtk-4.0-dev:arm64 \
             libsoup-3.0-dev:arm64 \
             libwebkit2gtk-4.1-dev:arm64
-          
-      - name: Configure Cross-Compilation
-        run: |
-          echo "PKG_CONFIG_PATH=/usr/lib/aarch64-linux-gnu/pkgconfig" >> $GITHUB_ENV
+          # Configure pkg-config for cross-compilation
           echo "PKG_CONFIG=/usr/bin/aarch64-linux-gnu-pkg-config" >> $GITHUB_ENV
           echo "PKG_CONFIG_ALLOW_CROSS=1" >> $GITHUB_ENV