Fix incorrect adding .h in bgfx_compile_shaders (#245)

Bumps the submodules group with 3 updates in the / directory: [bgfx](https://github.com/bkaradzic/bgfx), [bx](https://github.com/bkaradzic/bx) and [bimg](https://github.com/bkaradzic/bimg).


Updates `bgfx` from `af12904` to `409fbc5`
- [Commits](af12904d8c...409fbc5d14)

Updates `bx` from `e7ede51` to `3d53a4a`
- [Commits](e7ede513dc...3d53a4abaa)

Updates `bimg` from `2afa64c` to `aaf9125`
- [Commits](2afa64c14c...aaf9125234)

---
updated-dependencies:
- dependency-name: bgfx
  dependency-type: direct:production
  dependency-group: submodules
- dependency-name: bx
  dependency-type: direct:production
  dependency-group: submodules
- dependency-name: bimg
  dependency-type: direct:production
  dependency-group: submodules
...

Signed-off-by: dependabot[bot] <support@github.com>

cmake/bgfxToolUtils.cmake

@@ -603,7 +603,10 @@ if(TARGET bgfx::shaderc)
 			set(MKDIR_COMMANDS "")
 			foreach(PROFILE ${PROFILES})
 				_bgfx_get_profile_ext(${PROFILE} PROFILE_EXT)
-				set(OUTPUT ${ARGS_OUTPUT_DIR}/${PROFILE_EXT}/${SHADER_FILE_BASENAME}.bin$<$<BOOL:ARGS_AS_HEADERS>:.h>)
+				if(ARGS_AS_HEADERS)
+					set(HEADER_PREFIX .h)
+				endif()
+				set(OUTPUT ${ARGS_OUTPUT_DIR}/${PROFILE_EXT}/${SHADER_FILE_BASENAME}.bin${HEADER_PREFIX})
 				set(PLATFORM_I ${PLATFORM})
 				if(PROFILE STREQUAL "spirv")
 					set(PLATFORM_I LINUX)