Downgrade Java version for compilation, fixes #209

Author: brunchboy

.github/workflows/uberjar.yml

@@ -32,7 +32,7 @@ jobs:
     - name: Prepare Java
       uses: actions/setup-java@v4
       with:
-        java-version: '21'
+        java-version: '17'
         distribution: 'corretto'
 
     - name: Install clojure tools

CHANGELOG.md

@@ -6,7 +6,10 @@ This change log follows the conventions of
 
 ## [Unreleased][unreleased]
 
-Nothing so far.
+### Fixed
+
+- Changed the build workflow in GitHub Actions to go back to using Java 17 because of a [bug in the Clojure compiler](https://clojure.atlassian.net/browse/CLJ-2838) that would cause BLT to crash when running on any Java version older than Java 21 if it was compiled under Java 21.
+  Once that compiler bug is fixed, we can go back to compiling under Java 21.
 
 
 ## [8.0.0] - 2025-07-21