ci: bump the version of a few actions

cf. https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/

Author: yamt

.github/workflows/compile-tests.yml

@@ -41,7 +41,7 @@ jobs:
 
       - name: Upload precompiled tests
         if: matrix.os == 'ubuntu-latest'
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: assemblyscript-testsuite
           path: tests/assemblyscript/testsuite
@@ -67,7 +67,7 @@ jobs:
 
       - name: Upload precompiled tests
         if: matrix.os == 'ubuntu-latest'
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: rust-testsuite
           path: tests/rust/testsuite
@@ -119,7 +119,7 @@ jobs:
 
       - name: Upload precompiled tests
         if: matrix.os == 'ubuntu-latest'
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: c-testsuite
           path: tests/c/testsuite
@@ -150,7 +150,7 @@ jobs:
         run: git rm --ignore-unmatch tests/${{ matrix.suite }}/testsuite/*.wasm
 
       - name: Download ${{ matrix.suite }} test binaries
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: ${{ matrix.suite }}-testsuite
           path: ./tests/${{ matrix.suite }}/testsuite