Backport #11047: Capitalise “AArch” properly

[mergify]

The official capitalisation is “AArch”,
see https://developer.arm.com/documentation/102374/latest/.

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As noted by @ulysses4ever in #11033. Addition in #10705 by @GulinSS (who might want to tell us if he is OK with the change)

• Patches conform to the coding conventions.
• Any changes that could be relevant to users have been recorded in the changelog. ← note, forward-porting changelogs to master will have some conflicts because of this.
• The documentation has been updated, if necessary.
• Manual QA notes have been included. N/A
• Tests have been added. (Ask for help if you don’t know how to write them! Ask for an exemption if tests are too complex for too little coverage!) N/A

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  This is an automatic backport of pull request Capitalise “AArch” properly #11047 done by Mergify.

[mergify]

Cherry-pick of 48c2d4c has failed:

On branch mergify/bp/3.16/pr-11047
Your branch is up to date with 'origin/3.16'.

You are currently cherry-picking commit 48c2d4c2c.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   Cabal/src/Distribution/Simple/Build/PathsModule.hs
	modified:   Cabal/src/Distribution/Simple/Build/PathsModule/Z.hs
	modified:   cabal-dev-scripts/src/GenPathsModule.hs
	modified:   templates/Paths_pkg.template.hs

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   changelog.d/pr-10705

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally