Update Changelog and LTS version for 26.7

Author: Maleware

CHANGELOG.md

@@ -7,6 +7,7 @@ All notable changes to this project will be documented in this file.
 ### Added
 
 - BREAKING: Add required CLI argument and env var to set the image repository used to construct final product image names: `IMAGE_REPOSITORY` (`--image-repository`), eg. `oci.example.org/my/namespace` ([#684]).
+- Support for Spark `4.1.2` ([#708])
 
 ### Fixed
 
@@ -34,6 +35,7 @@ All notable changes to this project will be documented in this file.
 [#689]: https://github.com/stackabletech/spark-k8s-operator/pull/689
 [#696]: https://github.com/stackabletech/spark-k8s-operator/pull/696
 [#705]: https://github.com/stackabletech/spark-k8s-operator/pull/705
+[#708]: https://github.com/stackabletech/spark-k8s-operator/pull/708
 
 ## [26.3.0] - 2026-03-16
 

docs/modules/spark-k8s/partials/supported-versions.adoc

@@ -3,9 +3,10 @@
 // Stackable Platform documentation.
 // Please sort the versions in descending order (newest first)
 
-- 4.1.1 (Hadoop 3.4.2, Scala 2.13, Python 3.12, Java 21) (LTS)
+- 4.1.2 (Hadoop 3.4.3, Scala 2.13, Python 3.12, Java 21) (LTS)
+- 4.1.1 (Hadoop 3.4.3, Scala 2.13, Python 3.12, Java 21) (Deprecated)
 - 3.5.8 (Hadoop 3.4.2, Scala 2.12, Python 3.11, Java 17) (Deprecated)
 
-Apache Spark 4.1.1 has the following known issues (as of July 2026):
+Apache Spark 4.1.1 & 4.1.2 has the following known issues (as of July 2026):
 
 - Missing HBase compatibility (See: https://issues.apache.org/jira/browse/HBASE-30178)