Merge pull request #6007 from rabbitmq/mergify/bp/v3.9.x/pr-6006

Use Elixir 1.13.x with otp 24.x in bazel build (backport #6003) (backport #6004) (backport #6006)

Author: HoloRin

bazel/platforms/BUILD.bazel

@@ -24,7 +24,7 @@ platform(
     name = "erlang_linux_24_platform",
     constraint_values = [
         "@erlang_config//:erlang_24",
-        "@elixir_config//:elixir_1_12",
+        "@elixir_config//:elixir_1_13",
     ],
     parents = ["@rbe//config:platform"],
 )