Update multipleDatasources.adoc

[kovacicluka]

As in org.grails.plugins.datasource.DataSourceGrailsPlugin, configuration name is grails.transaction.chainedTransactionManager.

[CLAassistant]

All committers have signed the CLA.

[puneetbehl]

Please sign the CLA.

[kovacicluka]

Please sign the CLA.

I did, when I clicked again on "CLA not signed yet" I got "You have agreed to the CLA for grails/grails-doc"

[matrei]

Good catch! There are actually two more places where chainedTransactionManagerPostProcessor should be changed.

grails-doc/src/en/guide/conf/dataSource/multipleDatasources.adoc

Line 248 in 0da43fe

You can enable Grails to use the Best Effort 1PC pattern for handling transactions across multiple datasources. To do so you must set the `grails.transaction.chainedTransactionManagerPostProcessor.enabled` setting to `true` in `application.yml`:

grails-doc/src/en/guide/conf/dataSource/multipleDatasources.adoc

Line 254 in 0da43fe

chainedTransactionManagerPostProcessor:

Would you mind changing these as well in this PR?

[jamesfredley]

I'll submit those other 2 changes in another PR.

will submit other two changes in another PR

[jamesfredley]

And then will merging branches up to 7.0.x

[jamesfredley]

#916