[GenericPolling] Update docs (demisto#39250)

* RN

* Update Packs/CommonPlaybooks/ReleaseNotes/2_6_55.md

Co-authored-by: ShirleyDenkberg <[email protected]>

* Update Packs/CommonPlaybooks/ReleaseNotes/2_6_55.md

Co-authored-by: Arad Carmi <[email protected]>

---------

Co-authored-by: ShirleyDenkberg <[email protected]>
Co-authored-by: Arad Carmi <[email protected]>

Author: 3 people

Packs/CommonPlaybooks/Playbooks/playbook-GenericPolling.yml

@@ -9,6 +9,8 @@ description: |-
   1. Initiate the operation.
   2. Poll to check if the operation completed.
   3. (optional) Get the results of the operation.
+
+  NOTE: This playbook should be run only when the playbook's context is using the "Private to sub-playbook" option.
 fromversion: 5.0.0
 starttaskid: "0"
 tasks:

Packs/CommonPlaybooks/Playbooks/playbook-GenericPolling_README.md

@@ -7,6 +7,8 @@ The remote action should have the following structure:
 2. Poll to check if the operation completed.
 3. (optional) Get the results of the operation.
 
+**NOTE: This playbook should be run *only* when the playbook's context is using the "Private to sub-playbook" option.**
+
 For more information on polling, go to [Playbook Polling (Cortex XSOAR 6.x)](https://docs-cortex.paloaltonetworks.com/r/Cortex-XSOAR/6.x/Cortex-XSOAR-Playbook-Design-Guide/Playbook-Polling) or [Playbook Polling (Cortex XSOAR 8 Cloud)](https://docs-cortex.paloaltonetworks.com/r/Cortex-XSOAR/8/Cortex-XSOAR-Cloud-Documentation/Playbook-polling) or [Playbook Polling (Cortex XSOAR 8.7 On-prem)](https://docs-cortex.paloaltonetworks.com/r/Cortex-XSOAR/8.7/Cortex-XSOAR-On-prem-Documentation/Playbook-polling).
 
 ## Dependencies

Packs/CommonPlaybooks/ReleaseNotes/2_6_55.md

@@ -0,0 +1,6 @@
+
+#### Playbooks
+
+##### GenericPolling
+
+Improved documentation.

Packs/CommonPlaybooks/pack_metadata.json

@@ -2,7 +2,7 @@
     "name": "Common Playbooks",
     "description": "Frequently used playbooks pack.",
     "support": "xsoar",
-    "currentVersion": "2.6.54",
+    "currentVersion": "2.6.55",
     "author": "Cortex XSOAR",
     "url": "https://www.paloaltonetworks.com/cortex",
     "email": "",