CHANGELOG.md in google-apis-spanner_v1-0.21.0 vs CHANGELOG.md in google-apis-spanner_v1-0.22.0

@@ -1,6 +1,10 @@
 # Release history for google-apis-spanner_v1
 
+### v0.22.0 (2021-12-16)
+
+* Regenerated from discovery document revision 20211203
+
 ### v0.21.0 (2021-12-05)
 
 * Regenerated from discovery document revision 20211202
 
 ### v0.20.0 (2021-10-23)