monolog-bundle: reconfigure deprecation handler

symfony/monolog-bundle/3.7/config/packages/monolog.yaml

@@ -0,0 +1,4 @@
+# As of Symfony 5.1, deprecations are logged in the dedicated "deprecation" channel when it exists
+#monolog:
+#    channels:
+#        - deprecation

symfony/monolog-bundle/3.7/config/packages/prod/deprecations.yaml

@@ -1,8 +0,0 @@
-# As of Symfony 5.1, deprecations are logged in the dedicated "deprecation" channel when it exists
-#monolog:
-#    channels: [deprecation]
-#    handlers:
-#        deprecation:
-#            type: stream
-#            channels: [deprecation]
-#            path: php://stderr

symfony/monolog-bundle/3.7/config/packages/prod/monolog.yaml

@@ -15,3 +15,7 @@ monolog:
             type: console
             process_psr_3_messages: false
             channels: ["!event", "!doctrine"]
+#        deprecation:
+#            type: stream
+#            channels: [deprecation]
+#            path: php://stderr