[llvm] [libc++][ci] Use upload-artifact at v4 instead of @v3 (PR #79854)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-github-workflow

Author: Louis Dionne (ldionne)

<details>
<summary>Changes</summary>

The upload-artifact@<!-- -->v3 action is using Node 16, which is reaching EOL. As a result, we are getting warnings prompting us to move our jobs over to the latest version of upload-artifact.

---
Full diff: https://github.com/llvm/llvm-project/pull/79854.diff


1 Files Affected:

- (modified) .github/workflows/libcxx-build-and-test.yaml (+3-3) 


``````````diff
diff --git a/.github/workflows/libcxx-build-and-test.yaml b/.github/workflows/libcxx-build-and-test.yaml
index 9579c05f1c5b1af..ba5a63eac8bf8b4 100644
--- a/.github/workflows/libcxx-build-and-test.yaml
+++ b/.github/workflows/libcxx-build-and-test.yaml
@@ -75,7 +75,7 @@ jobs:
           CC: ${{ matrix.cc }}
           CXX: ${{ matrix.cxx }}
           ENABLE_CLANG_TIDY: ${{ matrix.clang_tidy }}
-      - uses: actions/upload-artifact at v3
+      - uses: actions/upload-artifact at v4
         if: always()
         with:
           name: ${{ matrix.config }}-${{ matrix.cxx }}-results
@@ -124,7 +124,7 @@ jobs:
           CC: ${{ matrix.cc }}
           CXX: ${{ matrix.cxx }}
           ENABLE_CLANG_TIDY: ${{ matrix.clang_tidy }}
-      - uses: actions/upload-artifact at v3
+      - uses: actions/upload-artifact at v4
         if: always()  # Upload artifacts even if the build or test suite fails
         with:
           name: ${{ matrix.config }}-results
@@ -189,7 +189,7 @@ jobs:
           CC: clang-18
           CXX: clang++-18
           ENABLE_CLANG_TIDY: "OFF"
-      - uses: actions/upload-artifact at v3
+      - uses: actions/upload-artifact at v4
         if: always()
         with:
           name: ${{ matrix.config }}-results

``````````

</details>


https://github.com/llvm/llvm-project/pull/79854