chore(deps): Bump the actions group with 2 updates (#47)

Bumps the actions group with 2 updates: [actions/upload-artifact](https://github.com/actions/upload-artifact) and [actions/download-artifact](https://github.com/actions/download-artifact).


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

Updates `actions/download-artifact` from 6 to 7
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/download-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

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

@@ -77,7 +77,7 @@ jobs:
             --lockfile conda-lock.yml
 
     - name: Upload lock files
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: scikit-hep-${{ matrix.python-version }}
         path: |
@@ -136,7 +136,7 @@ jobs:
             --lockfile conda-lock.yml
 
     - name: Upload lock files
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: iris-hep-${{ matrix.python-version }}
         path: |
@@ -201,7 +201,7 @@ jobs:
             --lockfile conda-lock.yml
 
     - name: Upload lock files
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: iris-hep-rc-${{ matrix.python-version }}
         path: |
@@ -229,32 +229,32 @@ jobs:
         cp -r iris-hep _site/
         cp -r iris-hep-rc _site/
 
-    - uses: actions/download-artifact@v6
+    - uses: actions/download-artifact@v7
       with:
         name: scikit-hep-3.8
         path: '_site/scikit-hep/3.8/'
 
-    - uses: actions/download-artifact@v6
+    - uses: actions/download-artifact@v7
       with:
         name: scikit-hep-3.12
         path: '_site/scikit-hep/3.12/'
 
-    - uses: actions/download-artifact@v6
+    - uses: actions/download-artifact@v7
       with:
         name: iris-hep-3.12
         path: '_site/iris-hep/3.12/'
 
-    - uses: actions/download-artifact@v6
+    - uses: actions/download-artifact@v7
       with:
         name: iris-hep-3.8
         path: '_site/iris-hep/3.8/'
 
-    - uses: actions/download-artifact@v6
+    - uses: actions/download-artifact@v7
       with:
         name: iris-hep-rc-3.12
         path: '_site/iris-hep-rc/3.12/'
 
-    - uses: actions/download-artifact@v6
+    - uses: actions/download-artifact@v7
       with:
         name: iris-hep-rc-3.8
         path: '_site/iris-hep-rc/3.8/'