Update for 21.2.0-rc2

.version

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-21.2.0-rc1
+21.2.0-rc2

CHANGES.md

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-ChangeLogs/ChangeLog-21.2.0-rc1.md
+ChangeLogs/ChangeLog-21.2.0-rc2.md

ChangeLogs/ChangeLog-21.2.0-rc2.md

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+
+Change Log for Release asterisk-21.2.0-rc2
+========================================
+
+Links:
+----------------------------------------
+
+ - [Full ChangeLog](https://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-21.2.0-rc2.md)  
+ - [GitHub Diff](https://github.com/asterisk/asterisk/compare/21.2.0-rc1...21.2.0-rc2)  
+ - [Tarball](https://downloads.asterisk.org/pub/telephony/asterisk/asterisk-21.2.0-rc2.tar.gz)  
+ - [Downloads](https://downloads.asterisk.org/pub/telephony/asterisk)  
+
+Summary:
+----------------------------------------
+
+- res_pjsip_stir_shaken.c:  Add checks for missing parameters                     
+
+User Notes:
+----------------------------------------
+
+
+Upgrade Notes:
+----------------------------------------
+
+
+Closed Issues:
+----------------------------------------
+
+  - #645: [bug]: Occasional SEGV in res_pjsip_stir_shaken.c
+
+Commits By Author:
+----------------------------------------
+
+- ### George Joseph (1):
+  - res_pjsip_stir_shaken.c:  Add checks for missing parameters
+
+
+Detail:
+----------------------------------------
+
+- ### res_pjsip_stir_shaken.c:  Add checks for missing parameters                     
+  Author: George Joseph  
+  Date:   2024-03-11  
+
+  * Added checks for missing session, session->channel and rdata
+    in stir_shaken_incoming_request.
+
+  * Added checks for missing session, session->channel and tdata
+    in stir_shaken_outgoing_request.
+
+  Resolves: #645
+