;doc: changelogs: minor release headings

hledger-lib/CHANGES.md

@@ -27,6 +27,8 @@ For user-visible changes, see the hledger package changelog.
 
 - lib: export transactionCheckBalanced (#1596)
 
+# 1.22.1 unreleased
+
 # 1.22 2021-07-03
 
 - GHC 9.0 is now officially supported, and GHC 8.0, 8.2, 8.4 are not;

hledger-ui/CHANGES.md

@@ -16,6 +16,8 @@ See also the hledger changelog.
   in V mode would correctly use the journal's last day as valuation date,
   not the day after that.
 
+# 1.22.1 unreleased
+
 # 1.22 2021-07-03
 
 Improvements

hledger-web/CHANGES.md

@@ -15,6 +15,8 @@ See also the hledger changelog.
   Make sure to strip prices from amounts before generating JSON data for
   the register chart.
 
+# 1.22.1 unreleased
+
 # 1.22 2021-07-03
 
 Improvements

hledger/CHANGES.md

@@ -27,6 +27,8 @@ User-visible changes in the hledger command line tool and library.
 
 - imp: close: clarify date logic, use journal last day if later (#1604)
 
+# 1.22.1 unreleased
+
 # 1.22 2021-07-03
 
 Features