build(deps): bump actions/download-artifact from 5 to 6 (#2702)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -144,7 +144,7 @@ jobs:
             cargo +nightly fmt --all -- --check ./crates/ink/tests/ui/trait_def/{pass,fail}/*.rs
 
       - name: Download all-contracts artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
             name: ${{ github.run_id }}-all-contracts
 
@@ -229,7 +229,7 @@ jobs:
           cache-key: ${{ matrix.type }}
 
       - name: Download all-contracts artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
             name: ${{ github.run_id }}-all-contracts
 
@@ -603,7 +603,7 @@ jobs:
           # cache-key: ${{ matrix.partition }}
 
       - name: Download all-contracts artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
             name: ${{ github.run_id }}-all-contracts
 
@@ -736,7 +736,7 @@ jobs:
         id: extract_branch
 
       - name: Download all-contracts artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
             name: ${{ github.run_id }}-all-contracts
 
@@ -766,7 +766,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download reports' artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
             path: downloaded_artifacts
 
@@ -814,7 +814,7 @@ jobs:
             id: extract_branch
 
           - name: Download all-contracts artifacts
-            uses: actions/download-artifact@v5
+            uses: actions/download-artifact@v6
             with:
                 name: ${{ github.run_id }}-all-contracts
 
@@ -858,7 +858,7 @@ jobs:
               type: [ sol, all ]
       steps:
           - name: Download reports' artifacts
-            uses: actions/download-artifact@v5
+            uses: actions/download-artifact@v6
             with:
                 path: downloaded_artifacts
 
@@ -896,7 +896,7 @@ jobs:
           cache-directories: ${{ github.workspace }}/${{ env.CARGO_TARGET_DIR }}
 
       - name: Download all-contracts artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
             name: ${{ github.run_id }}-all-contracts
 

.github/workflows/issue-notifier.yml

@@ -61,7 +61,7 @@ jobs:
     needs: fetch-issues
     steps:
       - name: Load outputs
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: outputs
           path: outputs

.github/workflows/pr-notifier.yml

@@ -58,7 +58,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Load outputs
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: outputs
           path: outputs