Update Gradle Wrapper to 7.3.1 (testcontainers#4761)

Co-authored-by: gradle-update-robot <gradle-update-robot@regolo.cc>

Author: github-actions[bot]

examples/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=f581709a9c35e9cb92e16f585d2c4bc99b2b1a5f85d2badbd3dc6bff59e1e6dd
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
+distributionSha256Sum=9afb3ca688fc12c761a0e9e4321e4d24e977a4a8916c8a768b1fe05ddb4d6b66
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=a8da5b02437a60819cad23e10fc7e9cf32bcb57029d9cb277e26eeff76ce014b
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-all.zip
+distributionSha256Sum=b75392c5625a88bccd58a574552a5a323edca82dab5942d2d41097f809c6bcce
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists