Repair CI on ARM aarch64

Author: ckormanyos

.github/workflows/real-time-cpp.yml

@@ -159,9 +159,12 @@ jobs:
         with:
           fetch-depth: '0'
       - name: update-tools
-        run: sudo apt install gcc-aarch64-none-elf
-      - name: target-arm-${{ matrix.suite }}
         run: |
+          wget https://developer.arm.com/-/media/Files/downloads/gnu/14.3.rel1/binrel/arm-gnu-toolchain-14.3.rel1-x86_64-aarch64-none-elf.tar.xz
+          tar -xf arm-gnu-toolchain-14.3.rel1-x86_64-aarch64-none-elf.tar.xz -C ${{ runner.workspace }}
+      - name: target-arm-aarch64-${{ matrix.suite }}
+        run: |
+          PATH="${{ runner.workspace }}/arm-gnu-toolchain-14.3.rel1-x86_64-aarch64-none-elf/bin:$PATH"
           ./target/build/build.sh ${{ matrix.suite }} rebuild
           ls -la ./bin/ref_app.hex ./bin/ref_app.s19 ./bin/ref_app.map
         working-directory: ./ref_app/