etc/makefiles/sketch.mk: Fix a typo

Signed-off-by: Gergely Nagy <algernon@keyboard.io>

etc/makefiles/sketch.mk

@@ -176,7 +176,7 @@ compile: kaleidoscope-hardware-configured
 ifeq ($(LIBONLY),)
 	$(QUIET) cp "${BUILD_PATH}/${SKETCH_FILE_NAME}.hex" "${HEX_FILE_PATH}"
 	$(QUIET) cp "${BUILD_PATH}/${SKETCH_FILE_NAME}.elf" "${ELF_FILE_PATH}"
-	$(QUIET) if [ -e "${BUILD_PATH}/${SKETCH_FILENAME}.bin" ]; then cp "${BUILD_PATH}/${SKETCH_FILE_NAME}.bin" "${BIN_FILE_PATH}"; else :; fi
+	$(QUIET) if [ -e "${BUILD_PATH}/${SKETCH_FILE_NAME}.bin" ]; then cp "${BUILD_PATH}/${SKETCH_FILE_NAME}.bin" "${BIN_FILE_PATH}"; else :; fi
 	$(QUIET) ln -sf "${OUTPUT_FILE_PREFIX}.hex" "${OUTPUT_PATH}/${SKETCH_BASE_NAME}-latest.hex"
 	$(QUIET) ln -sf "${OUTPUT_FILE_PREFIX}.elf" "${OUTPUT_PATH}/${SKETCH_BASE_NAME}-latest.elf"
 	$(QUIET) if [ -e "${OUTPUT_PATH}/${OUTPUT_FILE_PREFIX}.bin" ]; then ln -sf "${OUTPUT_FILE_PREFIX}.bin" "${OUTPUT_PATH}/${SKETCH_BASE_NAME}-latest.bin"; else :; fi