Merge pull request nasa#962 from rosspeters6/fix-961-update-osal-conf…

…ig-guide-link

Fix nasa#961, update OSAL Config Guide link

README.md

@@ -534,7 +534,7 @@ make
 make test
 ```
 
-See the [Configuration Guide](https://github.com/nasa/osal/blob/master/doc/OSAL-Configuration-guide.pdf) for more information.
+See the [Configuration Guide](https://github.com/nasa/osal/blob/main/doc/OSAL-Configuration-Guide.md) for more information.
 
 See also the autogenerated user's guide: <https://github.com/nasa/cFS/blob/gh-pages/OSAL_Users_Guide.pdf>