Bump csec version to 1.2.1

[lovesh-ap]

Java CSEC Public Release 1.2.1 is out with changes:

Fixes

• NR-259467 Fix issue of nested event generation from CSEC's agent itself PR-230

Changes

• NR-256459 Exclude JAX RS 4.0.0-M2 version from Instrumentation PR-231
• NR-256461 Exclude mssql-jdbc version 12.7.0 from Instrumentation PR-232
• NR-260369 Dependency version bump of commons-compress:1.21 to commons-compress:1.26.0

[jbedell-newrelic]

Implemented via: https://github.com/newrelic/newrelic-java-agent/pull/1870