Improve YAMLSyntax/Gotchas (#21575)

* Improve YAMLSyntax/Gotchas

Colons don't need to be quoted unless when followed by a space or the end of the line

* Update YAMLSyntax.rst

Minor edit.

docs/docsite/rst/YAMLSyntax.rst

@@ -123,11 +123,19 @@ While YAML is generally friendly, the following is going to result in a YAML syn
 
     foo: somebody said I should put a colon here: so I did
 
-You will want to quote any hash values using colons, like so::
+    windows_drive: c:
+
+...but this will work::
+
+    windows_path: c:\windows
+
+You will want to quote hash values using colons followed by a space or the end of the line::
 
     foo: "somebody said I should put a colon here: so I did"
+    
+    windows_drive: "c:"
 
-And then the colon will be preserved.
+...and then the colon will be preserved.
 
 Further, Ansible uses "{{ var }}" for variables.  If a value after a colon starts
 with a "{", YAML will think it is a dictionary, so you must quote it, like so::