Updating "*.json" references in camp.rst to be "*.yang"

Author: mfarina1

docs/camp.rst

@@ -14,11 +14,11 @@ The following environment variables control how the tool searches for and loads
 
 ADM_PATH
     This is the highest priority search path.
-    All files in the directory named by this variable following the pattern ``*.json`` are loaded as ADMs.
+    All files in the directory named by this variable following the pattern ``*.yang`` are loaded as ADMs.
 
 XDG_DATA_HOME, XDG_DATA_DIRS
     These directories are used in accordance with the `XDG Base Directory Specification <https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html>`_ with the suffix path ``/ace/adms``.
-    All files in the search subdirectories following the pattern ``*.json`` are loaded as ADMs.
+    All files in the search subdirectories following the pattern ``*.yang`` are loaded as ADMs.
 
 Examples
 ````````