Bug 2022560

Document URL: https://docs.openshift.com/container-platform/4.9/installing/installing_aws/installing-aws-user-infra.html#installation-supported-aws-machine-types_installing-aws-user-infra

Section Number and Name: Supported AWS machine types

Describe the issue: As discussed on RFE [https://issues.redhat.com/browse/SPLAT-329] & PR merged to support M6i instance types [https://github.com/openshift/installer/pull/5327] we should include M6i instance types as supported in our official docs. 

Suggestions for improvement: To include M6i instance types under doc:
https://docs.openshift.com/container-platform/4.9/installing/installing_aws/installing-aws-user-infra.html#installation-supported-aws-machine-types_installing-aws-user-infra



Additional information: 
It has been tested with 4.8 too and installation works. So the same should be included in 4.6+ since it has been tested out while changing instance types from m4 to m6i.xlarge and it works

Also it can be mentioned in Notes section that currently this instance is available in 8 out of 21 regions as speceied below in 2nd column so it's supported instance type if available in particular region

               count(m5.xlarge)  count(m6i.xlarge)  count(m5_diff_m6i)
region                                                                 
af-south-1                     3                  0                   3
ap-east-1                      3                  0                   3
ap-northeast-1                 3                  2                   1
ap-northeast-2                 4                  0                   4
ap-northeast-3                 3                  0                   3
ap-south-1                     3                  0                   3
ap-southeast-1                 3                  3                   0
ap-southeast-2                 3                  0                   3
ca-central-1                   3                  0                   3
eu-central-1                   3                  2                   1
eu-north-1                     3                  0                   3
eu-south-1                     3                  0                   3
eu-west-1                      3                  3                   0
eu-west-2                      3                  0                   3
eu-west-3                      3                  0                   3
me-south-1                     3                  0                   3
sa-east-1                      3                  0                   3
us-east-1                      5                  5                   0
us-east-2                      3                  3                   0
us-west-1                      2                  2                   0
us-west-2                      6                  4                   2