Change docs links to actual file extension (.md)

See https://gerrit-review.googlesource.com/83950 for detailed context.

Change-Id: I586af6756dbdaa05ebdcebf585919dc9ec85fdc3

src/main/resources/Documentation/config-rulebase-plugin-actions.md

diff --git a/src/main/resources/Documentation/config-rulebase-plugin-actions.md b/src/main/resources/Documentation/config-rulebase-plugin-actions.md
index b3e64be..cc3c462 100644
--- a/src/main/resources/Documentation/config-rulebase-plugin-actions.md
+++ b/src/main/resources/Documentation/config-rulebase-plugin-actions.md
@@ -13,7 +13,7 @@
 [`set-status-and-resolution`][action-set-status-and-resolution]
 : sets both the status and resolution of the issue
 
-[basic-actions]: config-rulebase-common.html#actions
+[basic-actions]: config-rulebase-common.md#actions
 
 [action-set-resolution]: #action-set-resolution
 ### <a name="action-set-resolution">Action: set-resolution</a>
@@ -70,4 +70,4 @@
 
 [Back to @PLUGIN@ documentation index][index]
 
-[index]: index.html
\ No newline at end of file
+[index]: index.html