Fix prometheus-cpp failure (#6073)

bazel/ray_deps_setup.bzl

@@ -103,14 +103,12 @@ def ray_deps_setup():
     )
 
     # OpenCensus depends on jupp0r/prometheus-cpp
-    http_archive(
+    git_repository(
         name = "com_github_jupp0r_prometheus_cpp",
-        strip_prefix = "prometheus-cpp-master",
-
+        commit = "5c45ba7ddc0585d765a43d136764dd2a542bd495",
         # TODO(qwang): We should use the repository of `jupp0r` here when this PR
         # `https://github.com/jupp0r/prometheus-cpp/pull/225` getting merged.
-        urls = ["https://github.com/jovany-wang/prometheus-cpp/archive/master.zip"],
-	sha256 = "d0c773da8af3db99c543dd0413f4427d835170eddfd517bfeba104236a8d2c07",
+        remote = "https://github.com/ray-project/prometheus-cpp.git",
     )
 
     http_archive(