docs: Add MD5 sums for the 10.0.5 release.

These can be generated only after the release has been tarred up and tagged.

docs/relnotes/10.0.5.html

@@ -31,6 +31,9 @@ because compatibility contexts not supported.
 
 <h2>MD5 checksums</h2>
 <pre>
+db606aadd0fe321f3664099677d159bc  MesaLib-10.0.5.tar.gz
+e6009ccd8898d7104bb325b6af9ec354  MesaLib-10.0.5.tar.bz2
+c8ab9e502542bf32299a4df85b0b704d  MesaLib-10.0.5.zip
 </pre>