Revert "Updated rules_jvm_external to version 6.0"

This reverts commit 4de9831.

Author: odisseus

WORKSPACE

@@ -1,13 +1,13 @@
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
-RULES_JVM_EXTERNAL_TAG = "6.0"
-RULES_JVM_EXTERNAL_SHA = "85fd6bad58ac76cc3a27c8e051e4255ff9ccd8c92ba879670d195622e7c0a9b7"
+RULES_JVM_EXTERNAL_TAG = "4.5"
+RULES_JVM_EXTERNAL_SHA = "b17d7388feb9bfa7f2fa09031b32707df529f26c91ab9e5d909eb1676badd9a6"
 
 http_archive(
     name = "rules_jvm_external",
     strip_prefix = "rules_jvm_external-%s" % RULES_JVM_EXTERNAL_TAG,
     sha256 = RULES_JVM_EXTERNAL_SHA,
-    url = "https://github.com/bazelbuild/rules_jvm_external/releases/download/%s/rules_jvm_external-%s.tar.gz" % (RULES_JVM_EXTERNAL_TAG, RULES_JVM_EXTERNAL_TAG),
+    url = "https://github.com/bazelbuild/rules_jvm_external/archive/%s.zip" % RULES_JVM_EXTERNAL_TAG,
 )
 
 load("@rules_jvm_external//:repositories.bzl", "rules_jvm_external_deps")
@@ -124,4 +124,4 @@ new_git_repository(
     remote = "https://github.com/ipld/java-cid.git",
     tag = "v1.3.8",
     build_file_content = CID_BUILD_FILE,
-)
+)