[bazel] Update platforms (#13509)

Fixes https://github.com/protocolbuffers/protobuf/issues/13500

Closes #13509

COPYBARA_INTEGRATE_REVIEW=https://github.com/protocolbuffers/protobuf/pull/13509 from keith:ks/bazel-update-platforms d0e577f7323dfaa4b395f8a17b9fc3cb0106d1ba
PiperOrigin-RevId: 561346885
diff --git a/WORKSPACE b/WORKSPACE
index cb1390c..73aada1 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -24,9 +24,11 @@
 # Bazel platform rules.
 http_archive(
     name = "platforms",
-    sha256 = "a879ea428c6d56ab0ec18224f976515948822451473a80d06c2e50af0bbe5121",
-    strip_prefix = "platforms-da5541f26b7de1dc8e04c075c99df5351742a4a2",
-    urls = ["https://github.com/bazelbuild/platforms/archive/da5541f26b7de1dc8e04c075c99df5351742a4a2.zip"],  # 2022-05-27
+    urls = [
+        "https://mirror.bazel.build/github.com/bazelbuild/platforms/releases/download/0.0.7/platforms-0.0.7.tar.gz",
+        "https://github.com/bazelbuild/platforms/releases/download/0.0.7/platforms-0.0.7.tar.gz",
+    ],
+    sha256 = "3a561c99e7bdbe9173aa653fd579fe849f1d8d67395780ab4770b1f381431d51",
 )
 
 http_archive(