ci-fuzz.yml: Disable step "Upload Sarif".

(It got in from the oss-fuzz's example cifuzz.yml, but IDK even what it
is so hopefully we can live without it.)

.github/workflows/ci-fuzz.yml

@@ -23,6 +23,7 @@ jobs:
         name: artifacts
         path: ./out/artifacts   
     - name: Upload Sarif
+      if: false   # Disable: This step seems not to work.
       if: always() && steps.build.outcome == 'success'
       uses: github/codeql-action/upload-sarif@v2
       with: