Salomon upgrade past tense...

docs.it4i/salomon-upgrade.md

-There's a planned upgrade of Salomon since 2018-12-04 til 2018-12-05.
-
 !!! Warning
-    This upgrade will introduce a lot of changes with respect to production and user experience.
+    This upgrade introduced a lot of changes with respect to production and user experience.
 
 !!! Hint
     You might **need** to **recompile** your binaries.
 
-Salomon operating system will be upgraded to the latest CentOS 7.6. We will be able to support the latest software versions and keep the cluster security with upstream releases after the upgrade.
+Salomon operating system has been upgraded to the latest CentOS 7.6 on 2018-12-05. We are able to support the latest software versions and keep the cluster security with upstream releases after the upgrade.
 
  Major changes are:
 
-* kernel will be upgraded to 3.10 (2.6.32 now)
-* glibc will be upgraded to 2.17 (2.12 now)
+* kernel upgraded to 3.10 (2.6.32 now)
+* glibc upgraded to 2.17 (2.12 now)
 * software modules/binaries should be recompiled or deleted
 
 ## Discontinued Modules