Fixed MeshAdventurer repeater build failing

Update build_src_filter in platformio.ini

variants/meshadventurer/platformio.ini

@@ -36,7 +36,7 @@ lib_deps =
 [env:Meshadventurer_sx1262_repeater]
 extends = Meshadventurer
 build_src_filter = ${Meshadventurer.build_src_filter}
-  +<../examples/simple_repeater/main.cpp>
+  +<../examples/simple_repeater>
   +<helpers/ui/SSD1306Display.cpp>
 build_flags =
   ${Meshadventurer.build_flags}
@@ -57,7 +57,7 @@ lib_deps =
 [env:Meshadventurer_sx1268_repeater]
 extends = Meshadventurer
 build_src_filter = ${Meshadventurer.build_src_filter}
-  +<../examples/simple_repeater/main.cpp>
+  +<../examples/simple_repeater>
   +<helpers/ui/SSD1306Display.cpp>
 build_flags =
   ${Meshadventurer.build_flags}