improve phrasing

wiki/src/blueprint/SponsorS/reports/2015_11.mdwn

@@ -173,11 +173,11 @@ which will be released on January 26 and be numbered 2.0. We renamed
 accordingly the versions coming after 2.0. Here is the new version
 numbers of the releases mentioned in past reports and budgets:
 
-  - Tails 1.9 will be Tails 2.0
-  - Tails 1.10 will be Tails 2.2 (the second major version in a row)
-  - Tails 1.11 will be Tails 2.3
-  - Tails 1.12 will be Tails 2.4
-  - Tails 1.13 will be Tails 2.5
+  - Tails 1.9 has been renamed Tails 2.0
+  - Tails 1.10 has been renamed Tails 2.2 (the second major version in a row)
+  - Tails 1.11 has been renamed Tails 2.3
+  - Tails 1.12 has been renamed Tails 2.4
+  - Tails 1.13 has been renamed Tails 2.5
 
 ## Various porting to Jessie