Clarify persistence override behavior in release notes

Version updated to 3.1.1 because 3.1.0 already got pushed to PowerShell Gallery

Author: awsr

Module/StreamXRef.psd1

@@ -6,7 +6,7 @@
 
     CompanyName = 'Alex Wiser'
 
-    ModuleVersion = '3.1.0'
+    ModuleVersion = '3.1.1'
 
     GUID = '8c89ef10-5110-4406-a876-82b8eadf5bb2'
 
@@ -41,10 +41,10 @@
             IconUri = ''
 
             ReleaseNotes = @'
-## 3.1.0
+## 3.1.1
 
 * Persistence: Added options for compressing and excluding clip mapping.
-* Persistence: Default filename is used for persistence override path if environment variable XRefPersistPath is not a *.json file.
+* Persistence: Join 'datacache.json' to path if environment variable XRefPersistPath is not a *.json file.
 * Import: Fixed counter only showing values from last file if pipelined multiple paths.
 
 ## 3.0.0

src/StreamXRef.psd1

@@ -6,7 +6,7 @@
 
     CompanyName = 'Alex Wiser'
 
-    ModuleVersion = '3.1.0'
+    ModuleVersion = '3.1.1'
 
     GUID = '8c89ef10-5110-4406-a876-82b8eadf5bb2'
 
@@ -41,10 +41,10 @@
             IconUri = ''
 
             ReleaseNotes = @'
-## 3.1.0
+## 3.1.1
 
 * Persistence: Added options for compressing and excluding clip mapping.
-* Persistence: Default filename is used for persistence override path if environment variable XRefPersistPath is not a *.json file.
+* Persistence: Join 'datacache.json' to path if environment variable XRefPersistPath is not a *.json file.
 * Import: Fixed counter only showing values from last file if pipelined multiple paths.
 
 ## 3.0.0