build(deps): bump webfactory/ssh-agent from 0.8.0 to 0.9.0

Bumps [webfactory/ssh-agent](https://github.com/webfactory/ssh-agent) from 0.8.0 to 0.9.0.
- [Release notes](https://github.com/webfactory/ssh-agent/releases)
- [Changelog](https://github.com/webfactory/ssh-agent/blob/master/CHANGELOG.md)
- [Commits](webfactory/ssh-agent@v0.8.0...v0.9.0)

---
updated-dependencies:
- dependency-name: webfactory/ssh-agent
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/book.yml

@@ -76,7 +76,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Prepare SSH Key
-        uses: webfactory/ssh-agent@v0.8.0
+        uses: webfactory/ssh-agent@v0.9.0
         with:
           ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
       - name: Fetch the Book
@@ -128,7 +128,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Prepare SSH Key
-        uses: webfactory/ssh-agent@v0.8.0
+        uses: webfactory/ssh-agent@v0.9.0
         with:
           ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
       - name: Fetch the Book
@@ -181,7 +181,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Prepare SSH Key
-        uses: webfactory/ssh-agent@v0.8.0
+        uses: webfactory/ssh-agent@v0.9.0
         with:
           ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
       - name: Fetch the Book
@@ -229,7 +229,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Prepare SSH Key
-        uses: webfactory/ssh-agent@v0.8.0
+        uses: webfactory/ssh-agent@v0.9.0
         with:
           ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
       - name: Fetch the Book
@@ -283,7 +283,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Prepare SSH Key
-        uses: webfactory/ssh-agent@v0.8.0
+        uses: webfactory/ssh-agent@v0.9.0
         with:
           ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
       - name: Fetch the Book
@@ -338,7 +338,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Prepare SSH Key
-        uses: webfactory/ssh-agent@v0.8.0
+        uses: webfactory/ssh-agent@v0.9.0
         with:
           ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
       - name: Fetch the Book