docs: Add sha256 sum for 20.3.2

Part-of: <mesa/mesa!8280>

docs: Add sha256 sum for 20.3.2
Part-of: <mesa/mesa!8280>
6398411b · Dylan Baker · fc5b436a · 6398411b
Commit 6398411b authored Dec 30, 2020 by Dylan Baker
--- a/docs/relnotes/20.3.2.rst
+++ b/docs/relnotes/20.3.2.rst
@@ -19,7 +19,7 @@ SHA256 checksum

 ::

-    TBD.
+    cce001b685d23afb976b04138714906abcf7e7f996da6355e6a43e5ca486533d  mesa-20.3.2.tar.xz


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