fixup! chore(sync-service): upgrade Elixir to 1.20.0-rc.3

Fix flaky CallHomeReporterTest by adding Bypass.pass after assert_receive.

CallHomeReporter.terminate/2 sends a final HTTP report via Task.async,
which races with Bypass's on_exit verification during test cleanup. The
Cowboy handler for this extra request can get killed by the shutdown
cascade, causing Bypass to record {:exit, :shutdown} and re-raise it.
Bypass.pass tells Bypass to return :ok during on_exit regardless.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: alco

packages/electric-telemetry/test/electric/telemetry/call_home_reporter_test.exs

@@ -72,6 +72,10 @@ defmodule ElectricTelemetry.CallHomeReporterTest do
     start_supervised!({ElectricTelemetry.ApplicationTelemetry, ctx.telemetry_opts})
 
     assert_receive :bypass_done, 500
+    # Bypass.pass prevents a race condition where CallHomeReporter.terminate/2 sends
+    # an extra HTTP request to Bypass during test cleanup, whose Cowboy handler can get
+    # killed by the shutdown cascade, causing Bypass to record a {:exit, :shutdown} error.
+    Bypass.pass(ctx.bypass)
   end
 
   test "reports all expected info when started under StackTelemetry", ctx do
@@ -117,6 +121,7 @@ defmodule ElectricTelemetry.CallHomeReporterTest do
     start_supervised!({ElectricTelemetry.StackTelemetry, ctx.telemetry_opts})
 
     assert_receive :bypass_done, 500
+    Bypass.pass(ctx.bypass)
   end
 
   test "StackTelemetry report data conforms to remote server schema", ctx do
@@ -143,6 +148,7 @@ defmodule ElectricTelemetry.CallHomeReporterTest do
     start_supervised!({ElectricTelemetry.StackTelemetry, ctx.telemetry_opts})
 
     assert_receive :bypass_done, 500
+    Bypass.pass(ctx.bypass)
   end
 
   defp add_bypass_expectation(%{bypass: bypass, telemetry_opts: telemetry_opts}, test_specific_fn) do