Update rst_gop_beta_cll.md

Adding information on rst_gop_beta_cll #206 (closed)

added DefenseSystem label

requested review from @hvaysset

assigned to @ftesson

added 50 commits

• 377c0b39...c62a379c - 49 commits from branch main
• 148f56bd - Merge branch 'main' into 'ftesson_gop_beta_cll'

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added 39 commits

• 148f56bd...9fd810f9 - 38 commits from branch main
• fa96c74b - Merge branch 'main' into ftesson_gop_beta_cll

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merged

mentioned in commit 48c9a573