chore(main): release spanner 1.93.0 (#20031)

🤖 I have created a release *beep* *boop*
---


##
[1.93.0](spanner/v1.92.0...spanner/v1.93.0)
(2026-07-15)


### Features

* **o11y:** Regenerate clients for LRO tracing
([#20107](#20107))
([779074e](779074e))
* **spanner:** Abstract Spanner Omni gRPC connection logic for
TLS/mTLS/plaintext as foundation of auth login functionality
([#14694](#14694))
([07d1ba5](07d1ba5))
* Update API sources and regenerate
([#20109](#20109))
([4314d30](4314d30))


### Bug Fixes

* **spanner:** Roll back read-write transaction before retrying
caller-returned Aborted errors
([#20131](#20131))
([83772f5](83772f5))
* **spanner:** Update dynamic channel pool default configuration
([#20080](#20080))
([308659c](308659c))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: rahul2393 <irahul@google.com>

Author: release-please[bot]

.release-please-individual-manifest.json

@@ -10,7 +10,7 @@
   "pubsub": "1.51.0",
   "pubsub/v2": "2.6.1",
   "pubsublite": "1.10.0",
-  "spanner": "1.92.0",
+  "spanner": "1.93.0",
   "storage": "1.63.1",
   "vertexai": "0.19.0"
 }

librarian.yaml

@@ -1290,7 +1290,7 @@ libraries:
           import_path: shopping/type
           proto_only: true
   - name: spanner
-    version: 1.92.0
+    version: 1.93.0
     apis:
       - path: google/spanner/v1
         go:

spanner/CHANGES.md

@@ -1,5 +1,20 @@
 # Changes
 
+## [1.93.0](https://github.com/googleapis/google-cloud-go/compare/spanner/v1.92.0...spanner/v1.93.0) (2026-07-15)
+
+
+### Features
+
+* **o11y:** Regenerate clients for LRO tracing ([#20107](https://github.com/googleapis/google-cloud-go/issues/20107)) ([779074e](https://github.com/googleapis/google-cloud-go/commit/779074edd267a26520bae459307660953129eb07))
+* **spanner:** Abstract Spanner Omni gRPC connection logic for TLS/mTLS/plaintext as foundation of auth login functionality ([#14694](https://github.com/googleapis/google-cloud-go/issues/14694)) ([07d1ba5](https://github.com/googleapis/google-cloud-go/commit/07d1ba54b7d88a8c41a38484b3b13fc44c9287cc))
+* Update API sources and regenerate ([#20109](https://github.com/googleapis/google-cloud-go/issues/20109)) ([4314d30](https://github.com/googleapis/google-cloud-go/commit/4314d305008d9a4b2d9f464d07519f8081b2277d))
+
+
+### Bug Fixes
+
+* **spanner:** Roll back read-write transaction before retrying caller-returned Aborted errors ([#20131](https://github.com/googleapis/google-cloud-go/issues/20131)) ([83772f5](https://github.com/googleapis/google-cloud-go/commit/83772f5980e8a11a679d04b3d3fce717f3a6f707))
+* **spanner:** Update dynamic channel pool default configuration ([#20080](https://github.com/googleapis/google-cloud-go/issues/20080)) ([308659c](https://github.com/googleapis/google-cloud-go/commit/308659cc6991ae846fa0d5e3de1e194b9ffd0efe))
+
 ## [1.92.0](https://github.com/googleapis/google-cloud-go/releases/tag/spanner%2Fv1.92.0) (2026-06-15)
 
 ### Features