Improve wording for SigSvc breaking changes

Author: ulrichb

docs/_data/changelog.yml

@@ -48,7 +48,7 @@
       version: 1.211.0
       breaking_changes:
         - text: |-
-            SignService breaking change: an internal API change requires a manual update. Follow the steps in the section _Update SignService with breaking changes_ of the installation guide.
+            SignService breaking change in an internal API. Please follow the steps in the section _Update SignService with breaking changes_ of the installation guide.
           issues: [SIGN-8325]
       improvements:
         - text: |-
@@ -1419,7 +1419,7 @@
       version: 1.169.0
       breaking_changes:
         - text: |-
-            SignService breaking change: an internal API change requires a manual update when upgrading from a version below 1.165. Follow the steps in the section _Update SignService with breaking changes_ of the installation guide.
+            SignService breaking change in an internal API. Please follow the steps in the section _Update SignService with breaking changes_ of the installation guide in case upgrading from a version below 1.165.
             
             Details: All file-based signing operations have been removed from the SignService API. Since version 1.165, all file-based signing operations have been executed by `signing-processor-service`.
           issues: [SIGN-6589]