infra/changelog: update for RD-INFRA-2021.04.30 release

Update the Neoverse reference design platform software release change
log document with the details of the changes introduced in the
RD-INFRA-2021.04.30 release.
Signed-off-by: Thomas Abraham <thomas.abraham@arm.com>
Change-Id: I7dd50b6b1ccc9b21323d6eb190160e8874e8ac46

docs/infra/change-log.rst

@@ -9,6 +9,22 @@ releases. The changes introduced with each of the release is listed under the
 the corresponding release tag. The release tag format is RD-INFRA-YYYY.MM.DD.
 
 
+RD-INFRA-2021.04.30
+-------------------
+- Release targetted for RD-N2 and RD-N2-Cfg1 platform software updates.
+- Introduces the support for multiple IO Macros. SMMU in the IO Macro path is
+  yet to be enabled.
+- Toolchain version has been changed from 8.3 to 10.2 for RD-N2 and RD-N2-Cfg1
+  platforms.
+- Tests completed for RD-N2 and RD-N1-Cfg1 platforms
+
+  ::
+
+    1. Busybox boot, Secure Boot, Distro boot, ACS tests (SBSA and SBBR).
+    2. WinPE boot has been removed from the list of supported features because the
+       IO macro support is still evolving.
+
+
 RD-INFRA-2021.03.25
 -------------------
 - Release targetted for