chore: release 0.75.0 (#3453)

diff --git a/CHANGES.md b/CHANGES.md
index 6befd9f..c2bebcb 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,19 @@
 # Changes
 
 
+## [0.75.0](https://www.github.com/googleapis/google-cloud-go/compare/v0.74.0...v0.75.0) (2021-01-11)
+
+
+### Features
+
+* **all:** auto-regenerate gapics , refs [#3514](https://www.github.com/googleapis/google-cloud-go/issues/3514) [#3501](https://www.github.com/googleapis/google-cloud-go/issues/3501) [#3497](https://www.github.com/googleapis/google-cloud-go/issues/3497) [#3455](https://www.github.com/googleapis/google-cloud-go/issues/3455) [#3448](https://www.github.com/googleapis/google-cloud-go/issues/3448)
+* **channel:** start generating apiv1 ([#3517](https://www.github.com/googleapis/google-cloud-go/issues/3517)) ([2cf3b3c](https://www.github.com/googleapis/google-cloud-go/commit/2cf3b3cf7d99f2efd6868a710fad9e935fc87965))
+
+
+### Bug Fixes
+
+* **internal/gapicgen:** don't regen files that have been deleted ([#3471](https://www.github.com/googleapis/google-cloud-go/issues/3471)) ([112ca94](https://www.github.com/googleapis/google-cloud-go/commit/112ca9416cc8a2502b32547dc8d789655452f84a))
+
 ## [0.74.0](https://www.github.com/googleapis/google-cloud-go/compare/v0.73.0...v0.74.0) (2020-12-10)