doc: cut v1.28.9 release

[andyzhangx]

What type of PR is this?
/kind documentation

What this PR does / why we need it:
doc: cut v1.28.9 release

Which issue(s) this PR fixes:

Fixes #

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Special notes for your reviewer:

git checkout -b cut-v1.28.9
sed -i 's/v1.28.8/v1.28.9/g' Makefile
sed -i 's/v1.28.8/v1.28.9/g' README.md
git diff
cd charts/
sed -i 's/v1.28.8/v1.28.9/g' README.md
sed -i 's/: v1.28.8/: v1.28.9/g' latest/azurefile-csi-driver/values.yaml
sed -i 's/: v1.28.8/: v1.28.9/g' latest/azurefile-csi-driver/Chart.yaml
cd latest
helm package azurefile-csi-driver
git rm azurefile-csi-driver-v1.28.8.tgz
git add azurefile-csi-driver-v1.28.9.tgz
cd ..
cp latest/ v1.28.9 -r
cd v1.28.9/
helm package azurefile-csi-driver
git add azurefile-csi-driver-v1.28.9.tgz
cd ../../
helm repo index charts --url=https://raw.githubusercontent.com/kubernetes-sigs/azurefile-csi-driver/master/charts
cd ./deploy/
sed -i 's/:v1.28.8/:v1.28.9/g' *.yaml
mkdir v1.28.9
cp *.yaml v1.28.9/
cd ../docs/
cp install-csi-driver-master.md install-csi-driver-v1.28.9.md
grep master install-csi-driver-v1.28.9.md
sed -i 's/master/v1.28.9/g' install-csi-driver-v1.28.9.md
cd ..
sed -i 's/:v1.28.8/:v1.28.9/g' docs/install-azurefile-csi-driver.md
git add charts/ deploy/ docs
$git_commit
git push origin cut-v1.28.9

Release note:

none

[k8s-ci-robot]

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This pull-request has been approved by: andyzhangx

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