chore(main): release 1.22.0 (#480)

release-please[bot] · web-flow · commit bc2d11022db9 · 2023-07-31T10:14:46.000-07:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.22.0](https://github.com/googleapis/gax-php/compare/v1.21.1...v1.22.0) (2023-07-31)
+
+
+### Features
+
+* Sets api headers for "gcloud-php-new" and "gcloud-php-legacy"  surface versions ([#470](https://github.com/googleapis/gax-php/issues/470)) ([2d8ccff](https://github.com/googleapis/gax-php/commit/2d8ccff419a076ee2fe9d3dc7ecd5509c74afb4c))
+
 ## [1.21.1](https://github.com/googleapis/gax-php/compare/v1.21.0...v1.21.1) (2023-06-28)
 
 
diff --git a/VERSION b/VERSION
@@ -1 +1 @@
-1.21.1
+1.22.0
