fix: change artifact ver from v4->v2

.gitea/workflows/CD.yml

@@ -45,7 +45,7 @@ jobs:
           GOARCH: ${{ matrix.arch }}
         run: go build -o banforge-${{ matrix.goos }}-${{ matrix.arch }} ./cmd/banforge
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v2
         with:
           name: banforge-${{ matrix.arch }}
           path: banforge-${{ matrix.goos }}-${{ matrix.arch }}
@@ -58,7 +58,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v2
         with:
           path: ./artifacts