[release/8.x] Bump the identity-dependencies group with 1 update (#8362)

Bumps Microsoft.Identity.Web from 3.9.0 to 3.9.4

---
updated-dependencies:
- dependency-name: Microsoft.Identity.Web
  dependency-version: 3.9.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: identity-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

eng/dependabot/independent/Versions.props

@@ -6,7 +6,7 @@
     <AzureIdentityVersion>1.14.0</AzureIdentityVersion>
     <AzureStorageBlobsVersion>12.24.0</AzureStorageBlobsVersion>
     <AzureStorageQueuesVersion>12.22.0</AzureStorageQueuesVersion>
-    <MicrosoftIdentityWebVersion>3.9.0</MicrosoftIdentityWebVersion>
+    <MicrosoftIdentityWebVersion>3.9.4</MicrosoftIdentityWebVersion>
     <MicrosoftOpenApiReadersVersion>1.6.24</MicrosoftOpenApiReadersVersion>
     <SystemPrivateUriVersion>4.3.2</SystemPrivateUriVersion>
     <SystemSecurityPrincipalWindowsVersion>5.0.0</SystemSecurityPrincipalWindowsVersion>