Use the version number from configure.ac in the website.

docs/site.yml

@@ -1,7 +1,10 @@
 # The key value pairs found below are available within the templates.
 
 
+# This line is modified by the Makefile. To change the version number,
+# edit the Autoconf version number at the top of configure.ac
 jq_version: 1.2
+
 root: '/jq'
 footer: |
   
@@ -11,4 +14,4 @@ footer: |
 
   jq is licensed under the MIT license (code) and the
   [CC-BY-3.0](http://creativecommons.org/licenses/by/3.0/) license
-  (docs).
+  (docs).