Update to rules_go v0.25.0 (#963)

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index a69f332..f6f49c7 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -4,10 +4,10 @@
 
 http_archive(
     name = "io_bazel_rules_go",
-    sha256 = "207fad3e6689135c5d8713e5a17ba9d1290238f47b9ba545b63d9303406209c6",
+    sha256 = "6f111c57fd50baf5b8ee9d63024874dd2a014b069426156c55adbf6d3d22cb7b",
     urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.24.7/rules_go-v0.24.7.tar.gz",
-        "https://github.com/bazelbuild/rules_go/releases/download/v0.24.7/rules_go-v0.24.7.tar.gz",
+        "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.25.0/rules_go-v0.25.0.tar.gz",
+        "https://github.com/bazelbuild/rules_go/releases/download/v0.25.0/rules_go-v0.25.0.tar.gz",
     ],
 )
 
@@ -15,9 +15,10 @@
 
 go_rules_dependencies()
 
-go_register_toolchains()
-
-go_register_toolchains(nogo = "@bazel_gazelle//:nogo")
+go_register_toolchains(
+    nogo = "@bazel_gazelle//:nogo",
+    version = "1.15.5",
+)
 
 load("//:deps.bzl", "gazelle_dependencies")