chore(ci): remove arm64 runner from main branch

Author: wangzhaode

.github/workflows/build.yml

@@ -38,7 +38,7 @@ jobs:
     needs: generate-data
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest, ubuntu-24.04-arm64]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         ujson_use_rapidjson: ["OFF", "ON"]
     runs-on: ${{ matrix.os }}
     name: build-test (${{ matrix.os }}, RapidJSON=${{ matrix.ujson_use_rapidjson }})