Merge pull request #303 from aconradi/fix-1.2-rn

Add `major 7` marker to 1.2 release-notes

Author: mandolaerik

RELEASENOTES-1.2.md

@@ -72,4 +72,5 @@
 - `note 6`  Improve porting rules for method return values: In some simple cases, avoid storing the method's return value in an intermediate local variable.
 - `release 6 6215`
 - `note 6`  If a bank declared with `use_io_memory=false` in a DML 1.4 file is imported from a DML 1.2 device, using the `dml12-compatibility.dml` library, then a call to the `transaction_access` method will now trigger a proper bank access. Also, if a bank uses the `dml12_compat_io_memory_access` template, then overrides of the `transaction_access` method will be honored. This simplifies future transition to the Simics 7 API.
-- `release 6 6218`
+- `release 6 6218`
+- `major 7`