Add porting guide for Ansible 10.3.0. (#1746)

docs/docsite/rst/porting_guides/porting_guide_10.rst

@@ -99,6 +99,44 @@ Networking
 
 No notable changes
 
+Porting Guide for v10.3.0
+=========================
+
+Known Issues
+------------
+
+community.docker
+~~~~~~~~~~~~~~~~
+
+- docker_container - when specifying a MAC address for a container's network, and the network is attached after container creation (for example, due to idempotency checks), the MAC address is at least in some cases ignored by the Docker Daemon (https://github.com/ansible-collections/community.docker/pull/933).
+
+dellemc.openmanage
+~~~~~~~~~~~~~~~~~~
+
+- idrac_diagnostics - Issue(285322) - This module doesn't support export of diagnostics file to HTTP and HTTPS share via SOCKS proxy.
+- idrac_firmware - Issue(279282) - This module does not support firmware update using HTTP, HTTPS, and FTP shares with authentication on iDRAC8.
+- idrac_storage_volume - Issue(290766) - The module will report success instead of showing failure for new virtual creation on the BOSS-N1 controller if a virtual disk is already present on the same controller.
+- ome_diagnostics - Issue(279193) - Export of SupportAssist collection logs to the share location fails on OME version 4.0.0.
+- ome_smart_fabric_uplink - Issue(186024) - The module supported by OpenManage Enterprise Modular, however it does not allow the creation of multiple uplinks of the same name. If an uplink is created using the same name as an existing uplink, then the existing uplink is modified.
+
+Deprecated Features
+-------------------
+
+community.docker
+~~~~~~~~~~~~~~~~
+
+- The collection deprecates support for all ansible-core versions that are currently End of Life, `according to the ansible-core support matrix <https://docs.ansible.com/ansible-core/devel/reference_appendices/release_and_maintenance.html#ansible-core-support-matrix>`__. This means that the next major release of the collection will no longer support ansible-core 2.11, ansible-core 2.12, ansible-core 2.13, and ansible-core 2.14.
+
+community.routeros
+~~~~~~~~~~~~~~~~~~
+
+- The collection deprecates support for all Ansible/ansible-base/ansible-core versions that are currently End of Life, `according to the ansible-core support matrix <https://docs.ansible.com/ansible-core/devel/reference_appendices/release_and_maintenance.html#ansible-core-support-matrix>`__. This means that the next major release of the collection will no longer support Ansible 2.9, ansible-base 2.10, ansible-core 2.11, ansible-core 2.12, ansible-core 2.13, and ansible-core 2.14.
+
+community.sops
+~~~~~~~~~~~~~~
+
+- The collection deprecates support for all Ansible/ansible-base/ansible-core versions that are currently End of Life, `according to the ansible-core support matrix <https://docs.ansible.com/ansible-core/devel/reference_appendices/release_and_maintenance.html#ansible-core-support-matrix>`__. This means that the next major release of the collection will no longer support Ansible 2.9, ansible-base 2.10, ansible-core 2.11, ansible-core 2.12, ansible-core 2.13, and ansible-core 2.14.
+
 Porting Guide for v10.2.0
 =========================