fix: ci deprecated actions (#302)

Author: M4tteoP

.github/workflows/ci.yaml

@@ -37,7 +37,7 @@ jobs:
       MULTIPHASE_EVAL: ${{ matrix.multiphase_eval }}
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:  # Ensure release_notes.sh can see prior commits
           fetch-depth: 0
 
@@ -84,10 +84,10 @@ jobs:
       - name: Run regression tests (ftw)
         run: go run mage.go ftw
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         if: success() || failure()
         with:
-          name: ftw-envoy-logs
+          name: ftw-envoy-logs-multiphase-${{ matrix.multiphase_eval }}
           path: build/ftw-envoy.log
 
       - name: Set up QEMU

.github/workflows/nightly-coraza-check.yaml

@@ -22,7 +22,7 @@ jobs:
       MULTIPHASE_EVAL: ${{ matrix.multiphase_eval }}
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Go
         uses: actions/setup-go@v3