Update stapler.version to v1981 (major) (#10606)

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

Author: renovate[bot]

bom/pom.xml

@@ -41,7 +41,7 @@ THE SOFTWARE.
     <commons-fileupload2.version>2.0.0-M2</commons-fileupload2.version>
     <groovy.version>2.4.21</groovy.version>
     <jelly.version>1.1-jenkins-20250108</jelly.version>
-    <stapler.version>1979.v5048d87384d7</stapler.version>
+    <stapler.version>1981.v20968387563a_</stapler.version>
   </properties>
 
   <dependencyManagement>