ci: Update release workflow from GCC5 to GCC toolchain

The upstream edk2 project renamed the GCC5 toolchain to GCC in commits
b38fea5 and c20483b. This caused OvmfPkg/build.sh to select the
GCC toolchain, producing output in DEBUG_GCC/, while the workflow still
looked for artifacts in DEBUG_GCC5/. As a result, the x86-64 build
succeeded but no artifact was uploaded.

Update the AArch64 build and both artifact paths to use GCC
consistently.

Signed-off-by: Bo Chen <bchen@crusoe.ai>

Author: likebreath

.github/workflows/release.yaml

@@ -33,7 +33,7 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: cloudhv-x64
-          path: Build/CloudHvX64/DEBUG_GCC5/FV/CLOUDHV.fd
+          path: Build/CloudHvX64/DEBUG_GCC/FV/CLOUDHV.fd
 
   build-aarch64:
     name: Build AArch64
@@ -51,15 +51,15 @@ jobs:
         run: |
           source edksetup.sh
           make -C BaseTools
-          export GCC5_AARCH64_PREFIX=aarch64-linux-gnu-
-          build -p ArmVirtPkg/ArmVirtCloudHv.dsc -a AARCH64 -t GCC5 -b DEBUG \
+          export GCC_AARCH64_PREFIX=aarch64-linux-gnu-
+          build -p ArmVirtPkg/ArmVirtCloudHv.dsc -a AARCH64 -t GCC -b DEBUG \
             --pcd gEfiMdeModulePkgTokenSpaceGuid.PcdDxeNxMemoryProtectionPolicy=0xC000000000007FD1
       - name: Upload AArch64 artifact
         if: github.event_name == 'create' && github.event.ref_type == 'tag'
         uses: actions/upload-artifact@v4
         with:
           name: cloudhv-aarch64
-          path: Build/ArmVirtCloudHv-AARCH64/DEBUG_GCC5/FV/CLOUDHV_EFI.fd
+          path: Build/ArmVirtCloudHv-AARCH64/DEBUG_GCC/FV/CLOUDHV_EFI.fd
 
   release:
     name: Release