stray references to .page files

Author: ajdavis

.gitignore

@@ -105,7 +105,6 @@ x64
 *.sln
 install_manifest.txt
 .vs
-doc/installing.page
 doc/html/_images
 CPackConfig.cmake
 CPackSourceConfig.cmake

CONTRIBUTING.md

@@ -55,14 +55,14 @@ and the existing codes or domains are inappropriate.
 
  - Add the domain to `mongoc_error_domain_t` in `src/mongoc/mongoc-error.h`        
  - Add the code to `mongoc_error_code_t` in `src/mongoc/mongoc-error.h`            
- - Add documentation for the domain or code to the table in `doc/mongoc_errors.page`
+ - Add documentation for the domain or code to the table in `doc/mongoc_errors.rst`
 
 ### Adding a new symbol
 
 This should be done rarely but there are several things that you need to do
 when adding a new symbol.
 
- - Add documentation for the new symbol in `doc/mongoc_your_new_symbol_name.page`
+ - Add documentation for the new symbol in `doc/mongoc_your_new_symbol_name.rst`
 
 ### Documentation