Chore(deps): Bump bridge-method-annotation from 1.18 to 1.21

Bumps [bridge-method-annotation](https://github.com/infradna/bridge-method-injector) from 1.18 to 1.21.
- [Release notes](https://github.com/infradna/bridge-method-injector/releases)
- [Commits](jenkinsci/bridge-method-injector@bridge-method-injector-parent-1.18...bridge-method-injector-parent-1.21)

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -436,7 +436,7 @@
     <dependency>
       <groupId>com.infradna.tool</groupId>
       <artifactId>bridge-method-annotation</artifactId>
-      <version>1.18</version>
+      <version>1.21</version>
       <optional>true</optional>
     </dependency>
     <!-- for stapler-jetty -->