Update dependency rules_proto to v7

Author: renovate[bot]

Diff for: WORKSPACE

@@ -20,10 +20,10 @@ http_archive(
 # To update this version, copy-paste instructions from https://github.com/bazelbuild/rules_proto/releases
 http_archive(
     name = "rules_proto",
-    sha256 = "e017528fd1c91c5a33f15493e3a398181a9e821a804eb7ff5acdd1d2d6c2b18d",
-    strip_prefix = "rules_proto-4.0.0-3.20.0",
+    sha256 = "798377bf1093d30cd740d347d1ec58c63701a32306daea44eb3b54459eef4494",
+    strip_prefix = "rules_proto-7.0.3",
     urls = [
-        "https://github.com/bazelbuild/rules_proto/archive/refs/tags/4.0.0-3.20.0.tar.gz",
+        "https://github.com/bazelbuild/rules_proto/archive/refs/tags/7.0.3.tar.gz",
     ],
 )
 load("@rules_proto//proto:repositories.bzl", "rules_proto_dependencies", "rules_proto_toolchains")