[JENKINS-37140,JENKINS-36991] - Upgrade remoting to 2.61 (#2497)

Fixed issues:
* [JENKINS-37140](https://issues.jenkins-ci.org/browse/JENKINS-37140) -
JNLP Slave connection issue with *JNLP3-connect* protocol when the generated encrypted cookie contains a newline symbols.
(jenkinsci/remoting#95)
* [JENKINS-36991](https://issues.jenkins-ci.org/browse/JENKINS-36991) -
Unable to load class when remote classloader gets interrupted.
(jenkinsci/remoting#94)

Enhancements:
* Improve diagnostics for Jar Cache write errors.
(jenkinsci/remoting#91)

pom.xml

@@ -180,7 +180,7 @@ THE SOFTWARE.
       <dependency>
         <groupId>org.jenkins-ci.main</groupId>
         <artifactId>remoting</artifactId>
-        <version>2.60</version>
+        <version>2.61</version>
       </dependency>
 
       <dependency>