Update CI build

Hardknott Yocto version is now available, add it to the CI builds.
Only dev branch remains tested against Yocto master.

Change-Id: Iec1227d616ff95b8406217f4d18ebfba80a0300a
Reviewed-by: Mikko Gronoff <mikko.gronoff@qt.io>
(cherry picked from commit c9da0eaec3)

README.md

@@ -20,7 +20,8 @@ Qt version.
 
 | Yocto \ Qt | dev | 6.1 | 6.0 |
 | ---------- |:---:|:---:|:---:|
-| master     |  x  |  x  |  x  |
+| master     |  x  |     |     |
+| hardknott  |  x  |  x  |  x  |
 | gatesgarth |  x  |  x  |  x  |
 | dunfell    |  x  |  x  |  x  |
 

coin/module_config.yaml

@@ -17,7 +17,7 @@ machine_type:
 #
 #           [target1]       [target2]   [target3]       [target4]
 # [machine] qemuarm64       qemux86     qemuarm         qemux86-64
-# [yocto]   gatesgarth      dunfell     gatesgarth      master
+# [yocto]   hardknott       dunfell     gatesgarth      hardknott
 # [X11]     no              no          yes             yes
 # [mingw]   no              yes         no              no
 #
@@ -30,7 +30,7 @@ target1: &target1
       variableValue: qemuarm64
     - type: EnvironmentVariable
       variableName: YOCTO_BRANCH
-      variableValue: gatesgarth
+      variableValue: hardknott
     - type: EnvironmentVariable
       variableName: DISABLE_X11
       variableValue: true
@@ -78,7 +78,7 @@ target4: &target4
       variableValue: qemux86-64
     - type: EnvironmentVariable
       variableName: YOCTO_BRANCH
-      variableValue: master
+      variableValue: hardknott
   enable_if:
       condition: property
       property: target.arch