vim-patch:9.1.0965: filetype: sh filetype set when detecting the use of bash (#31749)

Problem:  filetype: sh filetype set when detecting the use of bash
Solution: when bash is detected, use 'bash' filetype instead
          (Luca Saccarola)

closes: vim/vim#16309

b9b762c21f

runtime/lua/vim/filetype/detect.lua

@@ -1494,6 +1494,7 @@ local function sh(path, contents, name)
       vim.b[b].is_kornshell = nil
       vim.b[b].is_sh = nil
     end
+    return M.shell(path, contents, 'bash'), on_detect
     -- Ubuntu links sh to dash
   elseif matchregex(name, [[\<\(sh\|dash\)\>]]) then
     on_detect = function(b)