Update remaining actions (XRPLF#4949)

Downgrade {upload,download}-artifact action to v3 because of unreliability with v4.

.github/workflows/clang-format.yml

@@ -8,7 +8,7 @@ jobs:
     env:
       CLANG_VERSION: 10
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install clang-format
       run: |
         codename=$( lsb_release --codename --short )
@@ -30,7 +30,7 @@ jobs:
         git diff --exit-code | tee "clang-format.patch"
     - name: Upload patch
       if: failure() && steps.assert.outcome == 'failure'
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v3
       continue-on-error: true
       with:
         name: clang-format.patch

.github/workflows/doxygen.yml

@@ -17,7 +17,7 @@ jobs:
       image: docker://rippleci/rippled-ci-builder:2944b78d22db
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: check environment
         run: |
           echo ${PATH} | tr ':' '\n'

.github/workflows/levelization.yml

@@ -8,7 +8,7 @@ jobs:
     env:
       CLANG_VERSION: 10
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Check levelization
       run: Builds/levelization/levelization.sh
     - name: Check for differences
@@ -18,7 +18,7 @@ jobs:
         git diff --exit-code | tee "levelization.patch"
     - name: Upload patch
       if: failure() && steps.assert.outcome == 'failure'
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v3
       continue-on-error: true
       with:
         name: levelization.patch

.github/workflows/nix.yml

@@ -83,7 +83,7 @@ jobs:
         with:
           configuration: ${{ matrix.configuration }}
       - name: upload archive
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: ${{ matrix.platform }}-${{ matrix.compiler }}-${{ matrix.configuration }}
           path: conan.tar
@@ -112,7 +112,7 @@ jobs:
       build_dir: .build
     steps:
       - name: download cache
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v3
         with:
           name: ${{ matrix.platform }}-${{ matrix.compiler }}-${{ matrix.configuration }}
       - name: extract cache
@@ -161,7 +161,7 @@ jobs:
       build_dir: .build
     steps:
       - name: download cache
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v3
         with:
           name: ${{ matrix.platform }}-${{ matrix.compiler }}-${{ matrix.configuration }}
       - name: extract cache
@@ -201,7 +201,7 @@ jobs:
         run: |
           mv "${build_dir}/coverage.xml" ./
       - name: archive coverage report
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: coverage.xml
           path: coverage.xml