[RELEASE] React Native SDK v2.6.1

[marco-saia-datadog]

What does this PR do?

Prepares the v2.6.1 release of Datadog React Native SDK.

What's Changed

• RUM-6875 Use BigInteger from big-integer instead of bigint by @marco-saia-datadog in [RUM-6875] Use BigInteger from big-integer instead of bigint #765
• [FIX] Set SessionReplay sample rate default value to 100 by @marco-saia-datadog in [FIX] Set SessionReplay sample rate default value to 100 #768
• [IMPROVEMENT] Add paddedHex and decimal format to generateUUID by @marco-saia-datadog in [IMPROVEMENT] Add paddedHex and decimal format to generateUUID #770

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)
• If this PR is auto-generated, please make sure also to manually update the code related to the change

[datadog-datadog-prod-us1]

Datadog Report

Branch report: marcosaia/release/v2.6.1
Commit report: 1092862
Test service: dd-sdk-reactnative

✅ 0 Failed, 629 Passed, 1 Skipped, 11.7s Total Time