fix typo, 'action.config' should be 'actions.config'

Change I475f152bc1 made 'actions.config' the proper name for an its
rules configuration file but didn't update the doc to reflect it.
This change brings the doc up to date with that change.

Change-Id: I44b68ca775603752b6566f381f59cad16c2f84ee
(cherry picked from commit 7a29a3aa8fb9c9103197f00f8df616b8bdf0284d)
diff --git a/src/main/resources/Documentation/config-common.md b/src/main/resources/Documentation/config-common.md
index 989c7a9..4ad3c97 100644
--- a/src/main/resources/Documentation/config-common.md
+++ b/src/main/resources/Documentation/config-common.md
@@ -113,7 +113,7 @@
 ‘John Doe’ voted ‘+2’ for ‘Code-Review’ on a change”) should trigger
 which action on the ITS (e.g.: “Set issue's status to ‘Resolved’”) is
 configured through a [rule base][rule-base] in
-`etc/its/action.config`.
+`etc/its/actions.config`.
 
 [rule-base]: config-rulebase-common.html
 
diff --git a/src/main/resources/Documentation/config-rulebase-common.md b/src/main/resources/Documentation/config-rulebase-common.md
index 59a12bd..4712e31 100644
--- a/src/main/resources/Documentation/config-rulebase-common.md
+++ b/src/main/resources/Documentation/config-rulebase-common.md
@@ -44,7 +44,7 @@
 Goodness! Someone gave a negative code review in Gerrit on an
 associated change.” to each such issue.
 
-The order of rules in `etc/its/action.config` need not be
+The order of rules in `etc/its/actions.config` need not be
 respected. So in the above example, do not rely on `rule1` being
 evaluated before `rule2`.
 
@@ -591,4 +591,4 @@
 
 [Back to @PLUGIN@ documentation index][index]
 
-[index]: index.html
\ No newline at end of file
+[index]: index.html