doc: cut v1.26.0 release

[andyzhangx]

What type of PR is this?
/kind documentation

What this PR does / why we need it:
doc: cut v1.26.0 release

git checkout -b cut-v1.26.0
sed -i 's/v1.25.0/v1.26.0/g' Makefile
vi README.md
cd charts/
sed -i 's/v1.25.1/v1.26.0/g' README.md
sed -i 's/: latest/: v1.26.0/g' latest/blob-csi-driver/values.yaml
sed -i 's/k8s\/csi/oss\/kubernetes-csi/g' latest/blob-csi-driver/values.yaml
sed -i 's/: latest/: 1.26.0/g' latest/blob-csi-driver/Chart.yaml
sed -i 's/: v0.0.0/: 1.26.0/g' latest/blob-csi-driver/Chart.yaml
cd latest
helm package blob-csi-driver
cd ..
cp latest/ v1.26.0 -r
cd v1.26.0/
helm package blob-csi-driver
rm blob-csi-driver-v0.0.0.tgz
git add blob-csi-driver-1.26.0.tgz
cd ../../
helm repo index charts --url=https://raw.githubusercontent.com/kubernetes-sigs/blob-csi-driver/master/charts
sed -i 's/v1.25.0/v1.26.0/g' deploy/blobfuse-proxy/README.md
cd ./deploy/
sed -i 's/k8s\/csi/oss\/kubernetes-csi/g' ./*.yaml
sed -i 's/:latest/:v1.26.0/g' *.yaml
mkdir v1.26.0
cp *.yaml v1.26.0/
cd ../docs/
cp install-csi-driver-master.md install-csi-driver-v1.26.0.md
grep master install-csi-driver-v1.26.0.md
sed -i 's/master/v1.26.0/g' install-csi-driver-v1.26.0.md
cd ..
vi docs/install-blob-csi-driver.md
git add charts/ deploy/ docs
$git_commit
# second commit to revert back to latest version
sed -i 's/:v1.26.0/:latest/g' deploy/*.yaml
sed -i 's/oss\/kubernetes-csi\/blob-csi/k8s\/csi\/blob-csi/g' deploy/*.yaml
sed -i 's/: v1.26.0/: latest/g' charts/latest/blob-csi-driver/values.yaml
sed -i 's/oss\/kubernetes-csi\/blob-csi/k8s\/csi\/blob-csi/g' charts/latest/blob-csi-driver/values.yaml
sed -i 's/appVersion: 1.26.0/appVersion: latest/g' charts/latest/blob-csi-driver/Chart.yaml
sed -i 's/version: 1.26.0/version: v0.0.0/g' charts/latest/blob-csi-driver/Chart.yaml
cd charts/latest
helm package blob-csi-driver
git add blob-csi-driver-v0.0.0.tgz
git rm blob-csi-driver-1.26.0.tgz
cd ../../
helm repo index charts --url=https://raw.githubusercontent.com/kubernetes-sigs/blob-csi-driver/master/charts
$git_commit
git push origin cut-v1.26.0

**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:

Release note:

none

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx

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[andyzhangx]

/hold