bump the library version to 3.0.1 and update the release log

stephengold · stephengold · commit 62e50508a19d · 2025-08-31T18:48:06.000-07:00
diff --git a/gradle.properties b/gradle.properties
@@ -1,7 +1,7 @@
 ## configure Gradle properties for building the Jolt-JNI Project
 
 # Jolt-JNI version string
-jjVersion = 3.0.1-SNAPSHOT
+jjVersion = 3.0.1
 
 ## default artifact ID (used when -Partifact= isn't specified on the command line)
 artifact = jolt-jni
diff --git a/release-log.md b/release-log.md
@@ -1,5 +1,9 @@
 # Release log for the Jolt-JNI project
 
+## Version 3.0.1 released on 31 August 2025
+
+Bugfix:  many `CharacterRefC` and `CharacterVirtualRefC` methods crash the JVM
+
 ## Version 3.0.0 released on 30 August 2025
 
 + API changes:
