Check release notes ahead of 1.26.3 release

Author: jodygarnett

RELEASE_NOTES.txt

@@ -1,3 +1,31 @@
+GeoWebCache 1.26.3 (2025-05-12)
+-------------------------------
+
+Maintenance release.
+
+Improvements:
++++++++++++++
+
+- Mime type: advertise preferred content disposition
+- Support Environment Parametrization for WMSLayer Credentials 
+- Support loading the xml configuration from a read-only filesystem
+
+
+Fixes:
+++++++
+
+- Limit number of S3 requests when truncating based on tile range
+
+
+Updates:
+++++++++
+- Update to GeoTools 33.1
+- Updating to imageio-ext 1.4.15
+- Updating jai-ext to 1.1.31
+- Update commons-logging from 1.2 to 1.3.5
+- Upgrade hazelcast from 5.3.6 to 5.3.8
+- Update jai-ext to latest version (1.1.30)
+
 GeoWebCache 1.26.2 (2025-01-26)
 -------------------------------
 
@@ -9,7 +37,7 @@ Fixes:
 
 Updates:
 ++++++++
-- Update to GeoTools 32.2
+- Update to GeoTools 32.3
 - Upgrading ImageIO-Ext to 1.4.14
 
 Internals: