Docs: Update changelog

README.org

@@ -463,7 +463,8 @@ Simple links may also be written manually in either sexp or non-sexp form, like:
 
 ** 0.5.1-pre
 
-Nothing yet.
+*Fixed*
++  Custom sorting functions could corrupt the cache, causing items to disappear after refreshing an =org-ql-search= buffer.  ([[https://github.com/alphapapa/org-ql/issues/186][#186]], [[https://github.com/alphapapa/org-ql/issues/187][#187]].  Thanks to [[https://github.com/natask][Nathanael kinfe]].)
 
 ** 0.5
 

org-ql.info

@@ -859,7 +859,12 @@ File: README.info,  Node: 051-pre,  Next: 05,  Up: Changelog
 5.1 0.5.1-pre
 =============
 
-Nothing yet.
+*Fixed*
+   • Custom sorting functions could corrupt the cache, causing items to
+     disappear after refreshing an org-ql-search buffer.  (#186
+     (https://github.com/alphapapa/org-ql/issues/186), #187
+     (https://github.com/alphapapa/org-ql/issues/187).  Thanks to
+     Nathanael kinfe (https://github.com/natask).)
 
 
 File: README.info,  Node: 05,  Next: 049,  Prev: 051-pre,  Up: Changelog
@@ -1373,29 +1378,29 @@ Node: Links29571
 Node: Tips30258
 Node: Changelog30576
 Node: 051-pre31275
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-Node: Comparison with Org Agenda searches48066
-Node: org-sidebar48938
-Node: License49217
+Node: 0531692
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+Node: Comparison with Org Agenda searches48376
+Node: org-sidebar49248
+Node: License49527
 
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