pin esp_dmx to a working commit.

The current release/v3.1 is buggy and cannot receive dmx.
Until that is fixed we are sticking to the last working commit

platformio.ini

@@ -1038,7 +1038,7 @@ build_flags = ${common.build_flags} ${esp32.build_flagsV4} ${common_mm.build_fla
   ;-Wsuggest-attribute=const -Wsuggest-attribute=pure ;;  ask compiler for hints on attributes
   -D WLED_ENABLE_DMX_INPUT
 lib_deps = ${esp32.lib_depsV4} ${common_mm.lib_deps_S}
-  https://github.com/someweisguy/esp_dmx.git#release/v3.1  ;; for DMX_INPUT
+  https://github.com/someweisguy/esp_dmx.git#2f41703f95082e659f1464361b1d70c7f6341c8f  ;; for DMX_INPUT
 board_build.partitions = ${esp32.default_partitions}
 board_build.f_flash = 80000000L ; use full 80MHz speed for flash (default = 40Mhz) 
 board_build.flash_mode = dio ; (dio = dual i/o; more compatible than qio = quad i/o)