Fix PHP 8.4 deprecation notices (#1903)

src/Monolog/Handler/FingersCrossedHandler.php

@@ -67,16 +67,16 @@ class FingersCrossedHandler extends Handler implements ProcessableHandlerInterfa
      * @phpstan-param (Closure(LogRecord|null, HandlerInterface): HandlerInterface)|HandlerInterface $handler
      *
      * @param Closure|HandlerInterface          $handler            Handler or factory Closure($record|null, $fingersCrossedHandler).
-     * @param int|string|Level|LogLevel::*      $activationStrategy Strategy which determines when this handler takes action, or a level name/value at which the handler is activated
+     * @param int|string|Level|LogLevel::*|null $activationStrategy Strategy which determines when this handler takes action, or a level name/value at which the handler is activated
      * @param int                               $bufferSize         How many entries should be buffered at most, beyond that the oldest items are removed from the buffer.
      * @param bool                              $bubble             Whether the messages that are handled can bubble up the stack or not
      * @param bool                              $stopBuffering      Whether the handler should stop buffering after being triggered (default true)
      * @param int|string|Level|LogLevel::*|null $passthruLevel      Minimum level to always flush to handler on close, even if strategy not triggered
      *
-     * @phpstan-param value-of<Level::VALUES>|value-of<Level::NAMES>|Level|LogLevel::*|ActivationStrategyInterface $activationStrategy
-     * @phpstan-param value-of<Level::VALUES>|value-of<Level::NAMES>|Level|LogLevel::* $passthruLevel
+     * @phpstan-param value-of<Level::VALUES>|value-of<Level::NAMES>|Level|LogLevel::*|ActivationStrategyInterface|null $activationStrategy
+     * @phpstan-param value-of<Level::VALUES>|value-of<Level::NAMES>|Level|LogLevel::*|null $passthruLevel
      */
-    public function __construct(Closure|HandlerInterface $handler, int|string|Level|ActivationStrategyInterface $activationStrategy = null, int $bufferSize = 0, bool $bubble = true, bool $stopBuffering = true, int|string|Level|null $passthruLevel = null)
+    public function __construct(Closure|HandlerInterface $handler, int|string|Level|ActivationStrategyInterface|null $activationStrategy = null, int $bufferSize = 0, bool $bubble = true, bool $stopBuffering = true, int|string|Level|null $passthruLevel = null)
     {
         if (null === $activationStrategy) {
             $activationStrategy = new ErrorLevelActivationStrategy(Level::Warning);

src/Monolog/Handler/TelegramBotHandler.php

@@ -196,7 +196,7 @@ class TelegramBotHandler extends AbstractProcessingHandler
     /**
      * @return $this
      */
-    public function setTopic(int $topic = null): self
+    public function setTopic(?int $topic = null): self
     {
         $this->topic = $topic;