Release 5.7.3

Author: github-actions[bot]

docs/antora.yml

@@ -1,3 +1,2 @@
-name: ROOT
-version: '5.7.3'
-prerelease: '-SNAPSHOT'
+'name': 'ROOT'
+'version': '5.7.3'

gradle.properties

@@ -3,7 +3,7 @@ springJavaformatVersion=0.0.31
 springBootVersion=2.4.2
 springFrameworkVersion=5.3.22
 openSamlVersion=3.4.6
-version=5.7.3-SNAPSHOT
+version=5.7.3
 kotlinVersion=1.6.21
 samplesBranch=5.7.x
 org.gradle.jvmargs=-Xmx3g -XX:MaxPermSize=2048m -XX:+HeapDumpOnOutOfMemoryError