Bump gradle to 8.7-rc-3

[luka177]

Apparently 8.7 is not avalible anymore, that leads to error:

Downloading https://services.gradle.org/distributions/gradle-8.7-bin.zip

Exception in thread "main" java.io.FileNotFoundException: https://github.com/gradle/gradle-distributions/releases/download/v8.7.0/gradle-8.7-bin.zip
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1994)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1599)
	at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:223)
	at org.gradle.wrapper.Download.downloadInternal(Download.java:87)
	at org.gradle.wrapper.Download.download(Download.java:67)
	at org.gradle.wrapper.Install$1.call(Install.java:68)
	at org.gradle.wrapper.Install$1.call(Install.java:48)
	at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:69)
	at org.gradle.wrapper.Install.createDist(Install.java:48)
	at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:107)
	at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:63)

[cfig]

Thanks for the PR ~
And it's surprising that 8.7 is removed, unbelievable