[dotnet] include .snupkg in nuget_push runfiles so symbols get published

dotnet/private/nuget_push.bzl

diff --git a/dotnet/private/nuget_push.bzl b/dotnet/private/nuget_push.bzl
index 9bc2510..82471bf 100644
--- a/dotnet/private/nuget_push.bzl
+++ b/dotnet/private/nuget_push.bzl
@@ -38,6 +38,8 @@
     """Create bash script for Unix/macOS/Linux."""
     push_commands = []
     for nupkg in nupkg_files:
+        if not nupkg.basename.endswith(".nupkg"):
+            continue
         nupkg_runfiles_path = _to_runfiles_path(nupkg.short_path)
         push_commands.append(
             '"$DOTNET" nuget push "$RUNFILES_DIR/{nupkg}" --api-key "$NUGET_API_KEY" --source "$NUGET_SOURCE" --skip-duplicate'.format(nupkg = nupkg_runfiles_path),
@@ -77,6 +79,8 @@
     """Create batch script for Windows."""
     push_commands = []
     for nupkg in nupkg_files:
+        if not nupkg.basename.endswith(".nupkg"):
+            continue
         nupkg_runfiles_path = _to_runfiles_path(nupkg.short_path).replace("/", "\\")
         push_commands.append(
             '"%%DOTNET%%" nuget push "%%~dp0%s" --api-key "%%NUGET_API_KEY%%" --source "%%NUGET_SOURCE%%" --skip-duplicate' % nupkg_runfiles_path,
@@ -107,7 +111,7 @@
         "packages": attr.label_list(
             doc = "The nupkg files to push",
             mandatory = True,
-            allow_files = [".nupkg"],
+            allow_files = [".nupkg", ".snupkg"],
         ),
         "_windows_constraint": attr.label(
             default = "@platforms//os:windows",