Change docs links to actual file extension (.md)

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

Change-Id: Ia4a2f8a1bcc434380b8b0f84a5fb43f9d256281a
diff --git a/src/main/resources/Documentation/about.md b/src/main/resources/Documentation/about.md
index 5c0d532..84d3eb1 100644
--- a/src/main/resources/Documentation/about.md
+++ b/src/main/resources/Documentation/about.md
@@ -9,7 +9,7 @@
 For details on how to install this plugin start with the
 [Quick Install Guide][quick].
 
-[quick]: quick-install-guide.html
+[quick]: quick-install-guide.md
 [its-base]: https://gerrit-review.googlesource.com/#/admin/projects/plugins/its-base
 [storyboard]: http://git.openstack.org/cgit/openstack-infra/storyboard
 
diff --git a/src/main/resources/Documentation/config-connectivity.md b/src/main/resources/Documentation/config-connectivity.md
index a138c82..36ff372 100644
--- a/src/main/resources/Documentation/config-connectivity.md
+++ b/src/main/resources/Documentation/config-connectivity.md
@@ -4,7 +4,7 @@
 Please refer to the [quick install guide][quick] for info on how to
 configure a connection.
 
-[quick]: quick-install-guide.html
+[quick]: quick-install-guide.md
 [Back to @PLUGIN@ documentation index][index]
 
 [index]: index.html
diff --git a/src/main/resources/Documentation/quick-install-guide.md b/src/main/resources/Documentation/quick-install-guide.md
index 132fc10..8f2e1c4 100644
--- a/src/main/resources/Documentation/quick-install-guide.md
+++ b/src/main/resources/Documentation/quick-install-guide.md
@@ -125,9 +125,9 @@
 In order to install the @PLUGIN@ plugin simply copy the built jar
 file into the `plugins` folder.
 
-[config-common-doc]: config-common.html
-[config-doc]: config.html
-[rules-doc]: config-rulebase-common.html
+[config-common-doc]: config-common.md
+[config-doc]: config.md
+[rules-doc]: config-rulebase-common.md
 
 
 SEE ALSO