Issue #22261: Add a note to PCbuild\readme.txt about MSBuild switches.

Specifically, that they can be passed at the end of a build.bat invocation.

Initial patch by Shorya Raj.
diff --git a/Misc/ACKS b/Misc/ACKS
index 2e08533..266e7c4 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1104,6 +1104,7 @@
 Ram Rachum
 Jérôme Radix
 Burton Radons
+Shorya Raj
 Jeff Ramnani
 Brodie Rao
 Senko Rasic