Add decommssioned->decommissioned and variations

"decommssioned" (with a missing i) appears in several GitHub
repositories, such as
https://github.com/Datera/datera-automation-toolkit/blob/6fb2ca9d7e85826b300d3d7780c30cb09da433c7/qalib/whitebox/__init__.py#L69
https://github.com/dell/ansible-networker/blob/82ec3a95236b1e65ee4f9cbb03e6ffe96a85bca8/plugins/modules/clients.py#L223
https://github.com/naver/hadoop/blob/0c0a80f96283b5a7be234663e815bc04bafc8be2/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java#L787

"decommssion" also appears in several repositories:
https://github.com/cubefs/cubefs/blob/2912760ee5800e70b140f8ad84caf035dede0fce/master/cluster.go#L5316
https://github.com/jagerman/loki-sn-bot/blob/5beb6ba86744d84532ca9dd898a90ae8b43712a3/lokisnbot/network.py#L361

"decommssioning" appears as well:
https://github.com/Microchip-MPLAB-Harmony/wireless_zigbee/blob/cca50edd0d3d72695183ca3dfed7774c741ce40c/driver/zigbee_bz2/templates/app_zigbee_handler.h.ftl#L156
https://github.com/ashok-khanna/cmu-ai-repository/blob/685d5143204e3292777d2f283fe3977a1737905b/pubs/faqs/robotics/robot_3.html#L1615

Looking for variation without prefix "de", "commssion" also appears and
it obviously a typo (there are names with "commission" right next to it):
https://github.com/espressif/connectedhomeip/blob/903e149bd636a5cd1a8821864cb073b4f7a9d3d8/src/lib/mdns/Advertiser.h#L54
https://github.com/raselroky/POS_Software/blob/80c70844849997535e1ffb41c08cf9f48db249a4/purchase/models.py#L127

"commssioned" and "commssioning" also appears:
https://github.com/uwgraphics/VEP2_TCP_SimpleText/blob/7f17f7ab87560c8ea24a82d35789a11fd7e03e53/A4/A46094.txt#L16
https://github.com/STMicroelectronics/STM32CubeWB/blob/49bf08052c586dacc38fac82b355a1f0a8fb7109/Projects/P-NUCLEO-WB55.Nucleo/Applications/Zigbee/Zigbee_Commissioning_Client_Coord/readme.txt#L52

Going further, "commssioner", "commssioners", "commssions"... also
appear in some repositories.
https://github.com/basvandorst/where-is-satoshi/blob/0b579f41a829ff2d1fd46d0a1d9a811d275ddc9f/data/reddit/fuckthehacker.txt#L5