devel/nexus2-oss: update to 2.14.20-02

This is primarily a secure release; 2.14.20 also includes:

• [NEXUS-25956] Signatures with ECC algorithm not being recognized

PR: 252564
Security: b2f1f86f-20e6-11ec-a574-080027eedc6a
Security: 730e922f-20e7-11ec-a574-080027eedc6a

(cherry picked from commit 1e427d25951275287b076cabfd8b0c941beec269)