Do not hardcode fork name into version name

fixes build errors in certain situations

mix.exs

@@ -4,7 +4,7 @@ defmodule Pleroma.Mixfile do
   def project do
     [
       app: :pleroma,
-      version: version("3.10.3-bnakkoma"),
+      version: version("3.10.3"),
       elixir: "~> 1.14",
       elixirc_paths: elixirc_paths(Mix.env()),
       compilers: Mix.compilers(),
@@ -279,7 +279,7 @@ defmodule Pleroma.Mixfile do
            branch_name <- String.trim(branch_name),
            branch_name <- System.get_env("PLEROMA_BUILD_BRANCH") || branch_name,
            true <-
-             !Enum.any?(["master", "HEAD", "release/", "stable"], fn name ->
+             !Enum.any?(["master", "HEAD", "release/", "stable", "bnakkoma"], fn name ->
                String.starts_with?(name, branch_name)
              end) do
         branch_name =
@@ -296,7 +296,7 @@ defmodule Pleroma.Mixfile do
       cond do
         name = Application.get_env(:pleroma, :build_name) -> name
         name = System.get_env("PLEROMA_BUILD_NAME") -> name
-        true -> nil
+        true -> "bnakkoma"
       end
 
     env_name = if Mix.env() != :prod, do: to_string(Mix.env())