fix link

Author: norareidy

source/upgrade.txt

@@ -79,9 +79,10 @@ A breaking change is a change of a convention or a behavior starting in a specif
 version of the library. This type of change may prevent your application from working
 properly if not addressed before upgrading the library.
 
-The breaking changes in this section are categorized by the library version that introduced
-them. When upgrading library versions, address all the breaking changes between the current
-and upgrade versions.
+The breaking changes in this section are categorized by the library
+version that introduced them. Only major library versions introduce
+breaking changes. When upgrading versions, address all
+the breaking changes between the current and upgrade versions.
 
 For more information on release changes, see the release notes and associated 
 JIRA tickets for each release on `GitHub <https://github.com/mongodb/mongo-php-library/releases>`__.
@@ -90,7 +91,7 @@ Version 1.0 Breaking Changes
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 To view breaking changes for this major release, see the 
-:github:`release notes </mongo-php-library/releases/tag/1.0.0>`
+:github:`release notes </mongodb/mongo-php-library/releases/tag/1.0.0>`
 on GitHub.
 
 .. _php-compat-changes: