Update NEWS.

NEWS

@@ -12,6 +12,32 @@ Please send bug reports to
 <https://gitlab.inria.fr/guix-hpc/guix-kernel>.
 
 
+* Changes in 0.2.2 (since 0.2.1)
+** Bug fixes
+
+*** Publish a message upon startup (<https://issues.guix.gnu.org/49355>)
+
+    Previously, Guix-Jupyter would fail to say “hi” on the IOPub socket, which
+    newer Notebook versions would interpret as kernel failure.
+
+*** Correctly report idle/busy status
+    (<https://gitlab.inria.fr/guix-hpc/guix-kernel/-/issues/3>)
+
+    Until now, Guix-Jupyter would always appear to be busy.  Consequently, the
+    favicon and the indicator in the top-right corner of the Jupyter Notebook
+    web interface would suggest that.  Additionally, completion requests would
+    not be sent, on the grounds that the kernel is busy.
+
+*** Kernel no longer crashes on ‘;;guix download’ directives for local files
+    (<https://gitlab.inria.fr/guix-hpc/guix-kernel/-/issues/4>)
+
+    Kernel no longer crashes when passed a ‘download’ directive for a local
+    file, as in:
+
+    #+begin_example
+      ;;guix download /home/charlie/data.txt 17f5172af292021343644368b5123bf333a8cc8b25818788d9042e2d8dd81293
+    #+end_example
+
 * Changes in 0.2.1 (since 0.2.0)
 
 ** Bug fix