Add submodule release note entries

documentation/new-notes/README.txt

@@ -34,7 +34,7 @@ where nnn is the number of the pull request. If you haven't created the pull
 request yet you can use the number from a related GitHub issue, or use some
 other name, then rename and push it after the PR has been created.
 
-The file should start with a level-3 Markdown title for the entry, like this:
+The file *must* start with a level-3 Markdown title for the entry, like this:
 
     ### Conflict-free release note entries for GitHub pull requests
 
@@ -46,6 +46,9 @@ The file should start with a level-3 Markdown title for the entry, like this:
    (followed by a blank line to separate it from the next paragraph), or a
    link to the PR may be integrated into the text that follows.
  * Use blank lines between paragraphs of text, and code-blocks for examples.
+ * I recommend using [semantic line-breaks](https://sembr.org/) in Markdown
+   files, it makes editing easier and reduces the number of lines that change
+   in most commits. This README.txt file isn't formatted as Markdown.
 
 Release note entries are not intended to provide full documentation of major
 features. For small features or changes though, they may provide all the

documentation/new-notes/normativeTypes-6.0.2.md

@@ -0,0 +1,7 @@
+### normativeTypes Module
+
+Changes to this module since the previous release:
+
+#### Release 6.0.2
+
+- Fix potential NULL pointer dereference in `NTNDArray::getValueSize()`

documentation/new-notes/pvAccess-7.1.8.md

@@ -0,0 +1,11 @@
+### pvAccess Module
+
+Changes to this module since the previous release:
+
+#### Release 7.1.8
+
+- Compatible changes
+  - Capped the number and age of PVA beacons to avoid a resource leak. Beacons
+    older than 360 seconds will be destroyed automatically, new beacons will be
+    ignored if >=2048 exist already.
+  - Various Clang, MSVC and GCC compiler warnings cleaned up.

documentation/new-notes/pvData-8.0.7.md

@@ -0,0 +1,11 @@
+### pvData Module
+
+Changes to this module since the previous release:
+
+#### Release 8.0.7
+
+- Compatible changes
+  - Allow epics::pvData::Timer to be cancelled during callback execution.
+  - Clang compiler warnings cleaned up.
+  - Limit periodic timers to one catch-up after missing many events.
+ 

documentation/new-notes/pvaClient-4.8.1.md

@@ -0,0 +1,8 @@
+### pvaClient Module
+
+Changes to this module since the previous release:
+
+## Release 4.8.1
+
+* Fix error message generation code.
+