Document blockLightWeightTags config option

Solves: Jira GER-1764
Change-Id: I57faf3dea7744f7459de5ebb7b19743b9cf97faf

src/main/resources/Documentation/config-project-level.md

diff --git a/src/main/resources/Documentation/config-project-level.md b/src/main/resources/Documentation/config-project-level.md
index 844a965..ef8192c 100644
--- a/src/main/resources/Documentation/config-project-level.md
+++ b/src/main/resources/Documentation/config-project-level.md
@@ -11,6 +11,7 @@
       blockedRef = ^refs/heads/user/.*
       blockedProject = user/projects/*
       blockedProject = top/secret/project
+      blockLightWeightTags = True.
 ```
 
 ## Section "EventListeners" ##
@@ -30,3 +31,7 @@
 blockedProject
 : Pattern(s) that blocks event creation for all matching projects.
   Supported: REGEX - if starts with "^", WILDCARD - if ends with "*", EXACT - in other cases.
+
+blockLightWeightTags
+: Decides whether ArtC and CD events should be created for lightweight tags.
+  (Default: _False_).