chore(main): release 2.59.1 (#3824)

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


<details><summary>2.59.1</summary>

##
[2.59.1](v2.59.0...v2.59.1)
(2025-06-12)


### Bug Fixes

* S2A- Check if a default endpoint has been set
([#3784](#3784))
([5b2ab82](5b2ab82))


### Dependencies

* update google auth library dependencies to v1.37.0
([#3830](#3830))
([8bf9d3c](8bf9d3c))
</details>

---
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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>

Author: release-please[bot]

gapic-generator-java-bom/pom.xml

@@ -127,12 +127,12 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-iam-v3</artifactId>
-        <version>1.53.1-SNAPSHOT</version><!-- {x-version-update:proto-google-iam-v3:current} -->
+        <version>1.53.1</version><!-- {x-version-update:proto-google-iam-v3:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-iam-v3beta</artifactId>
-        <version>1.53.1-SNAPSHOT</version><!-- {x-version-update:proto-google-iam-v3beta:current} -->
+        <version>1.53.1</version><!-- {x-version-update:proto-google-iam-v3beta:current} -->
       </dependency>
 
       <!-- Following test deps are kept to keep them consistent with versions above -->
@@ -164,12 +164,12 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-iam-v3</artifactId>
-        <version>1.53.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-iam-v3:current} -->
+        <version>1.53.1</version><!-- {x-version-update:grpc-google-iam-v3:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-iam-v3beta</artifactId>
-        <version>1.53.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-iam-v3beta:current} -->
+        <version>1.53.1</version><!-- {x-version-update:grpc-google-iam-v3beta:current} -->
       </dependency>
     </dependencies>
 

java-iam/pom.xml

@@ -145,12 +145,12 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-iam-v3</artifactId>
-        <version>1.53.1-SNAPSHOT</version><!-- {x-version-update:proto-google-iam-v3:current} -->
+        <version>1.53.1</version><!-- {x-version-update:proto-google-iam-v3:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-iam-v3</artifactId>
-        <version>1.53.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-iam-v3:current} -->
+        <version>1.53.1</version><!-- {x-version-update:grpc-google-iam-v3:current} -->
       </dependency>
       <dependency>
         <groupId>javax.annotation</groupId>