Merge pull request #477 from havencarlson/fix-readme-links

Fix #472, updated broken links in README

README.md

@@ -13,8 +13,9 @@ This bundle has not been fully verified as an operational system, and is provide
 The cFS Framework is a core subset of cFS.  There are additional OSALs, PSPs, and tools as listed below available from a variety of sources.
 
 ## References Documentation
-  - cFE User's Guide: https://github.com/nasa/cFS/blob/gh-pages/cFE_Users_Guide.pdf
-  - OSAL User's Guide: https://github.com/nasa/cFS/blob/gh-pages/OSAL_Users_Guide.pdf
+  - cFE User's Guide: https://github.com/nasa/cFS/blob/gh-pages/cfe-usersguide.pdf
+  - OSAL User's Guide: https://github.com/nasa/cFS/blob/gh-pages/osal-apiguide.pdf
+  - Combined Mission documentation: https://github.com/nasa/cFS/blob/gh-pages/mission-doc.pdf
   - cFE App Developer's Guide: https://github.com/nasa/cFE/blob/main/docs/cFE%20Application%20Developers%20Guide.md
   - Training documentation: https://ntrs.nasa.gov/citations/20210022378
   - cFS Overview: https://cfs.gsfc.nasa.gov/cFS-OviewBGSlideDeck-ExportControl-Final.pdf