uid_uri_db: typo a/an backwards incompatible

src/modules/uid_uri_db/uid_uri_db_mod.c

@@ -53,7 +53,7 @@ MODULE_VERSION
 /*
  * Version of domain table required by the module,
  * increment this value if you change the table in
- * an backwards incompatible way
+ * a backwards incompatible way
  */
 #define URI_TABLE_VERSION 2