fix: update upload and download artifact actions to v4

The upload and download artifact actions using v3 were deprecated,
and the website deployment depends on them. Updated both actions
to v4 in the workflow run to ensure proper deployment.

Author: Unique-Usman

.github/workflows/analysis.yml

@@ -70,7 +70,7 @@ jobs:
         run: |
           python -m pytest -m slow --selectAlgorithm ${{ matrix.algorithm }} --saveFileName test_output_${{ matrix.algorithm }}_${{ matrix.SNR }}.csv --SNR ${{ matrix.SNR }} --fitCount 300 --saveDurationFileName test_duration_${{ matrix.algorithm }}_${{ matrix.SNR }}.csv
       - name: Upload raw data
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
             name: Working_Data
             retention-days: 1
@@ -83,7 +83,7 @@ jobs:
     needs: build
     steps:
       - name: Download artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           path: artifacts
       - name: Merge fitting results
@@ -95,7 +95,7 @@ jobs:
           head -n 1 $(ls artifacts/Working_Data/test_duration_*.csv | head -n 1) > test_duration.csv
           tail -q -n +2 artifacts/Working_Data/test_duration_*.csv >> test_duration.csv
       - name: Upload merged artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Data
           path: |
@@ -121,13 +121,13 @@ jobs:
             any::data.table
             any::ggplot2
       - name: Download artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: Data
       - name: Generate figures
         run: Rscript --vanilla tests/IVIMmodels/unit_tests/analyze.r test_output.csv test_duration.csv
       - name: Upload figures
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: always()
         with:
             name: Figures
@@ -158,13 +158,13 @@ jobs:
             any::tidyverse
             any::assertr
       - name: Download artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: Data
       - name: Test against previous results
         run: Rscript --vanilla tests/IVIMmodels/unit_tests/compare.r test_output.csv test_reference.csv tests/IVIMmodels/unit_tests/reference_output.csv test_results.csv
       - name: Upload data
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: always()
         with:
             name: Comparison