Update GitHub Artifact Actions

Author: renovate[bot]

.github/workflows/build.yml

@@ -37,7 +37,7 @@ jobs:
         working-directory: ${{ matrix.id }}
         env:
           OUTPUT: ${{ matrix.id }}-${{ matrix.version }}.mrpack
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v5
         with:
           name: ${{ matrix.id }}
           path: ${{ matrix.id }}/${{ matrix.id }}-${{ matrix.version }}.mrpack
@@ -50,7 +50,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
       - name: Download modpacks
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v6
         with:
           path: ../modpacks
       - name: Create build folder