Bump actions/upload-artifact from 5 to 6

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

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  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

@@ -1,46 +1,46 @@
-name: Continuous Integration
-
-on:
-  push:
-    paths-ignore:
-      - 'docs/**'
-      - '*.md'
-      - '*.txt'
-      - '*.PNG'
-      - 'makerelease.bat'
-      - 'testfiles/**'
-      - 'translation/**'
-
-jobs:
-  build:
-    runs-on: windows-2022
-    strategy:
-      max-parallel: 4
-      matrix:
-        build_configuration: [Release, Debug]
-        build_platform: [x64, x86]
-
-    steps:
-    - name: Checkout repo
-      uses: actions/checkout@v6
-
-    - name: Add msbuild to PATH
-      uses: microsoft/setup-msbuild@v2.0.0
-
-    - name: MSBuild of solution
-      run: msbuild JsonToolsNppPlugin/JsonToolsNppPlugin.sln /p:configuration="${{ matrix.build_configuration }}" /p:platform="${{ matrix.build_platform }}" /m /verbosity:minimal
-
-    - name: Archive artifacts for x64
-      if: matrix.build_platform == 'x64' && matrix.build_configuration == 'Release'
-      uses: actions/upload-artifact@v5
-      with:
-          name: plugin_dll_x64
-          path: JsonToolsNppPlugin\bin\${{ matrix.build_configuration }}-x64\JsonTools.dll
-
-    - name: Archive artifacts for x86
-      if: matrix.build_platform == 'x86' && matrix.build_configuration == 'Release'
-      uses: actions/upload-artifact@v5
-      with:
-          name: plugin_dll_x86
-          path: JsonToolsNppPlugin\bin\${{ matrix.build_configuration }}\JsonTools.dll
-
+name: Continuous Integration
+
+on:
+  push:
+    paths-ignore:
+      - 'docs/**'
+      - '*.md'
+      - '*.txt'
+      - '*.PNG'
+      - 'makerelease.bat'
+      - 'testfiles/**'
+      - 'translation/**'
+
+jobs:
+  build:
+    runs-on: windows-2022
+    strategy:
+      max-parallel: 4
+      matrix:
+        build_configuration: [Release, Debug]
+        build_platform: [x64, x86]
+
+    steps:
+    - name: Checkout repo
+      uses: actions/checkout@v6
+
+    - name: Add msbuild to PATH
+      uses: microsoft/setup-msbuild@v2.0.0
+
+    - name: MSBuild of solution
+      run: msbuild JsonToolsNppPlugin/JsonToolsNppPlugin.sln /p:configuration="${{ matrix.build_configuration }}" /p:platform="${{ matrix.build_platform }}" /m /verbosity:minimal
+
+    - name: Archive artifacts for x64
+      if: matrix.build_platform == 'x64' && matrix.build_configuration == 'Release'
+      uses: actions/upload-artifact@v6
+      with:
+          name: plugin_dll_x64
+          path: JsonToolsNppPlugin\bin\${{ matrix.build_configuration }}-x64\JsonTools.dll
+
+    - name: Archive artifacts for x86
+      if: matrix.build_platform == 'x86' && matrix.build_configuration == 'Release'
+      uses: actions/upload-artifact@v6
+      with:
+          name: plugin_dll_x86
+          path: JsonToolsNppPlugin\bin\${{ matrix.build_configuration }}\JsonTools.dll
+