Update README.md (minor grammatical fixes)

README.md

@@ -6,6 +6,9 @@ You are probably looking for this:
 
 I'm trying some things with the code and posting it as I go in case any of it helps the project authors.  Trying to use this in your project is not recommended at this time.  Go use the properly supported Terrain3D project instead, link above.
 
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+Note: I am very new to sharing work on Github.  I would appreciate any advice on best practices (that a Git novice could implement), especially related to making sure whatever I'm doing over here doesn't interfere with the Terrain3D main branch in any way.  Hopefully I have my repo fully 'its own thing', because I expect the changes I'm making are so drastic they'll need to be considered carefully and as a whole before being implmented at all in any larger projects.
 
 -- Change log
 
@@ -34,9 +37,3 @@ I'm trying some things with the code and posting it as I go in case any of it he
 * Switched the find_cameras() function in Terrain3D.cpp over to the Godot 4.2+ method outlined in the comments.  Works fine, maybe have helped with an intermittent stability issue i was encountering at startup, hard to say.  Certainly faster than recursively parsing the scenetree.
 
 * Built a copy of the documentation.  It was an epic jounrney of weird documentation apps, libraries, modules and sub modules i never heard of before, but it did eventually build the requisite files.  But as it turns out, that doesn't matter because Godot currently has no way to actually implment those generated files within it's own database, for GDExtensions.  The generated HTML docs look quite nice though, so if anyone else was having problems getting it to generate from XML, maybe have a look.  I had to change a couple things to get it to work, mostly adding a class.rst file on level above the docs xml.
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