Fix Doxyfile quoting and doxy.sh typo

docs/Doxyfile

@@ -42,7 +42,7 @@ DOXYFILE_ENCODING      = UTF-8
 # title of most generated pages and in a few other places.
 # The default value is: My Project.
 
-PROJECT_NAME           = M5Unit-METER
+PROJECT_NAME           = "M5Unit-METER"
 
 # The PROJECT_NUMBER tag can be used to enter a project or revision number. This
 # could be handy for archiving the generated documentation or if some version

docs/doxy.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Please execute on repositry root
+# Please execute on repository root
 
 ## Get version from library.properties
 ## Get git rev of HEAD