FINERACT-2421: Increase matrix job shard number

[adamsaghy]

Description

Describe the changes made and why they were made. (Ignore if these details are present on the associated Apache Fineract JIRA ticket.)

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[Aman-Mittal]

Seems Ok to merge

[Aman-Mittal]

@adamsaghy Im thinking that we need to add checks related to GA checks

ASF have some reccomendations for that

https://github.com/apache/infrastructure-actions#auditing-repositories-for-actions-security-tooling

Im implementing these for new repos for now.