ci: fix icu4c on macos and CIFuzz test

.github/workflows/cifuzz.yaml

@@ -22,7 +22,7 @@ jobs:
        dry-run: false
        sanitizer: ${{ matrix.sanitizer }}
    - name: Upload Crash
-     uses: actions/upload-artifact@v1
+     uses: actions/upload-artifact@v4
      if: failure()
      with:
        name: ${{ matrix.sanitizer }}-artifacts

.github/workflows/go.yaml

@@ -21,7 +21,11 @@ jobs:
       GO: ${{ matrix.go }}
     steps:
       - if: startsWith(matrix.os, 'macos')
-        run: brew update
+        run: |
+          brew update
+          # Handle issues with the upgrade to icu4c v76.
+          [[ -e "$(brew --prefix)/opt/icu4c" ]] || \
+            brew reinstall icu4c
 
       - uses: actions/setup-go@v2
         with: