Fixed the command in README for adding dtoverlay=disable-bt into the boot config (#28)

* ignored plist files

* fixed command for adding disable-bt into boot config

.gitignore

@@ -21,6 +21,9 @@ _deps
 # Ignore thumbnails created by windows
 Thumbs.db
 
+# Ignore files created by clang-check
+*.plist
+
 # Ignore files build by Visual Studio
 *.obj
 *.pdb

README.md

@@ -152,7 +152,7 @@ The steps above can be done by the following commands:
 
 ```shell
 sudo systemctl disable bluetooth.service serial-getty@ttyAMA0.service
-grep -E 'dtoverlay=disable-bt' /boot/config.txt || echo 'dtoverlay=disable-bt' | sudo tee /boot/config.txt
+grep '^dtoverlay=disable-bt' /boot/config.txt || echo 'dtoverlay=disable-bt' | sudo tee -a /boot/config.txt
 sudo sed -i 's/^console=serial0,115200 *//' /boot/cmdline.txt
 ```