Symfony 6.3.0-RC2 has just been released.
Here is the list of the most important changes since 6.3.0-RC1:

• feature #50445 [AssetMapper] Add "=alias" syntax to importmap:require (@weaverryan)
• bug #50442 [SecurityBundle] Update security-1.0.xsd to include missing access-token definition (@aegypius)
• bug #50440 [DependencyInjection] Revert "Use weak references in the container" (@nicolas-grekas)
• bug #50429 [Console] block input stream if needed (@joelwurtz)
• bug #50397 [HttpKernel][VarDumper] Fix dumping with labels (@nicolas-grekas)
• bug #50408 [AssetMapper] Change default importmap "provider" to JsDelivr+esm (@weaverryan, @nicolas-grekas)
• bug #50394 [AssetMapper] Avoid loading potentially ALL assets in dev server (@weaverryan)
• bug #50400 [AssetMapper] Sometimes asset contents are built from non-asset files (@weaverryan)
• bug #50406 [VarDumper] Fix dd() showing line with null (@HypeMC)
• bug #50393 [AssetMapper] Fixing incorrect exception & adding allowing more realistic error mode (@weaverryan)

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backwards-compatibility very closely, this should be quite easy. Use
SymfonyInsight upgrade reports
to detect the code you will need to change in your project and
read our upgrade
documentation to learn more.
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