Bump actions/upload-artifact from 6 to 7

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

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/CI_build.yml

@@ -43,7 +43,7 @@ jobs:
 
     - name: Archive artifacts for x64
       if: matrix.build_platform == 'x64'
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v7
       with:
           name: nppRandomStringGenerator.${{ env.version }}.x64
           path: nppRandomStringGenerator\bin\Release-x64\nppRandomStringGenerator.dll
@@ -59,7 +59,7 @@ jobs:
         
     - name: Archive artifacts for x86
       if: matrix.build_platform == 'x86'
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v7
       with:
           name: nppRandomStringGenerator.${{ env.version }}.x86
           path: nppRandomStringGenerator\bin\Release\nppRandomStringGenerator.dll