Update 5.x-rc.md

doc/5.x-rc.md

@@ -16,6 +16,7 @@ See [Prerequisites](any-prereq.md)
     * https://test.civicrm.org/job/CiviCRM-Core-Matrix/
     * https://test.civicrm.org/job/CiviCRM-Ext-Matrix/
     * https://test.civicrm.org/job/CiviCRM-E2E-Matrix/
+    * https://test.civicrm.org/job/CiviCRM-D8-Matrix/
 
 ## 2: Bump version number on `master` to `5.X.beta1`
 
@@ -88,6 +89,8 @@ civi-git-table --fetch master 5.X
     * In the list of `CIVIVER`s, remove any old RC's. Add the current RC. (ex: `4.6 5.X master`)
 * Go to https://test.civicrm.org/job/CiviCRM-E2E-Matrix/configure
     * In the list of `CIVIVER`s, remove any old RC's. Add the current RC. (ex: `4.6 5.X master`)
+* Go to https://test.civicrm.org/job/CiviCRM-D8-Matrix/configure
+    * In the list of `CIVIVER`s, remove any old RC's. Add the current RC. (ex: `4.6 5.X master`)
 * Go to https://test.civicrm.org/job/CiviCRM-Publish-Schedule/configure
     * In the list of `branchNames`, remove any old RC's. Add the current RC. (ex: `master 4.6 5.X`)