Update build submodule with optional docs publishing

[hasheddan]

Description of your changes

Updates the build submodule to include optionally publishing docs. When
a branch is no longer supported, the Makefile should be updated to
DOCS_VERSION_ACTIVE=false and it will be removed when publishing to the
docs repo.

Signed-off-by: hasheddan georgedanielmangum@gmail.com

xref crossplane/docs#107

I have:

• Read and followed Crossplane's contribution process.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

See upbound/build#166

[github-actions]

Backport failed for release-1.2, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git fetch origin release-1.2
git worktree add -d .worktree/backport-2513-to-release-1.2 origin/release-1.2
cd .worktree/backport-2513-to-release-1.2
git checkout -b backport-2513-to-release-1.2
ancref=$(git merge-base 8b51c9d93ee09e8af214625d41df61c7d700fa4e 389b813867db730a4d07bc70a863b4806a7914c6)
git cherry-pick -x $ancref..389b813867db730a4d07bc70a863b4806a7914c6

[github-actions]

Backport failed for release-1.1, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git fetch origin release-1.1
git worktree add -d .worktree/backport-2513-to-release-1.1 origin/release-1.1
cd .worktree/backport-2513-to-release-1.1
git checkout -b backport-2513-to-release-1.1
ancref=$(git merge-base 8b51c9d93ee09e8af214625d41df61c7d700fa4e 389b813867db730a4d07bc70a863b4806a7914c6)
git cherry-pick -x $ancref..389b813867db730a4d07bc70a863b4806a7914c6

[github-actions]

Backport failed for release-1.3, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git fetch origin release-1.3
git worktree add -d .worktree/backport-2513-to-release-1.3 origin/release-1.3
cd .worktree/backport-2513-to-release-1.3
git checkout -b backport-2513-to-release-1.3
ancref=$(git merge-base 8b51c9d93ee09e8af214625d41df61c7d700fa4e 389b813867db730a4d07bc70a863b4806a7914c6)
git cherry-pick -x $ancref..389b813867db730a4d07bc70a863b4806a7914c6