[release]

Bump README.md references to 7.3

Author: philsttr

README.md

@@ -1,6 +1,6 @@
 > !! This document applies to the next version under development.
 >
->     See [here for documentation on the latest released version](https://github.com/logfellow/logstash-logback-encoder/tree/logstash-logback-encoder-7.2).
+>     See [here for documentation on the latest released version](https://github.com/logfellow/logstash-logback-encoder/tree/logstash-logback-encoder-7.3).
 
 # Logstash Logback Encoder
 
@@ -98,7 +98,7 @@ Maven style:
 <dependency>
     <groupId>net.logstash.logback</groupId>
     <artifactId>logstash-logback-encoder</artifactId>
-    <version>7.2</version>
+    <version>7.3</version>
     <!-- Use runtime scope if the project does not have any compile-time usage of logstash-logback-encoder,
          such as usage of StructuredArguments/Markers or implementations such as
          JsonProvider, AppenderListener, JsonFactoryDecorator, JsonGeneratorDecorator, etc
@@ -109,7 +109,7 @@ Maven style:
 <dependency>
     <groupId>ch.qos.logback</groupId>
     <artifactId>logback-classic</artifactId>
-    <version>1.3.0</version>
+    <version>1.3.5</version>
     <!-- Use runtime scope if the project does not have any compile-time usage of logback,
          such as implementations of Appender, Encoder, Layout, TurboFilter, etc
     <scope>runtime</scope>