Update dependency org.jenkins-ci.plugins:mailer to v525 (jenkinsci#23891)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

test/pom.xml

@@ -250,7 +250,7 @@ THE SOFTWARE.
     <dependency>
       <groupId>org.jenkins-ci.plugins</groupId>
       <artifactId>mailer</artifactId>
-      <version>522.va_995fa_cfb_8b_d</version>
+      <version>525.v2458b_d8a_1a_71</version>
       <scope>test</scope>
     </dependency>
     <dependency>

war/pom.xml

@@ -283,7 +283,7 @@ THE SOFTWARE.
                   <!-- detached after 1.493 -->
                   <groupId>org.jenkins-ci.plugins</groupId>
                   <artifactId>mailer</artifactId>
-                  <version>522.va_995fa_cfb_8b_d</version>
+                  <version>525.v2458b_d8a_1a_71</version>
                   <type>hpi</type>
                 </artifactItem>
                 <artifactItem>