Documentation/releases: Add 4.17 release notes template

Change-Id: Iffb95257fa99f3276f851507a0c9e4583c47bacc
Signed-off-by: Jason Glenesk <jason.glenesk@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61573
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

Documentation/releases/coreboot-4.17-relnotes.md

@@ -0,0 +1,19 @@
+Upcoming release - coreboot 4.17
+================================
+
+The 4.17 release is planned for May, 2022.
+
+We are continuing the quarterly release cadence in order to enable others to
+release quarterly on a fresher version of coreboot.
+
+Update this document with changes that should be in the release notes.
+
+* Please use Markdown.
+* See the past few release notes for the general format.
+* The chip and board additions and removals will be updated right
+  before the release, so those do not need to be added.
+
+Significant changes
+-------------------
+
+### Add significant changes here