[release/7.2] Bump Microsoft.Identity.Web in /eng/dependabot

Bumps [Microsoft.Identity.Web](https://github.com/AzureAD/microsoft-identity-web) from 2.11.1 to 2.12.4.
- [Release notes](https://github.com/AzureAD/microsoft-identity-web/releases)
- [Changelog](https://github.com/AzureAD/microsoft-identity-web/blob/master/changelog.md)
- [Commits](AzureAD/microsoft-identity-web@2.11.1...2.12.4)

---
updated-dependencies:
- dependency-name: Microsoft.Identity.Web
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

eng/dependabot/Versions.props

@@ -11,7 +11,7 @@
     <MicrosoftExtensionsLoggingConsoleVersion>7.0.0</MicrosoftExtensionsLoggingConsoleVersion>
     <MicrosoftExtensionsLoggingEventSourceVersion>7.0.0</MicrosoftExtensionsLoggingEventSourceVersion>
     <MicrosoftIdentityModelTokensVersion>6.31.0</MicrosoftIdentityModelTokensVersion>
-    <MicrosoftIdentityWebVersion>2.11.1</MicrosoftIdentityWebVersion>
+    <MicrosoftIdentityWebVersion>2.12.4</MicrosoftIdentityWebVersion>
     <MicrosoftOpenApiReadersVersion>1.6.5</MicrosoftOpenApiReadersVersion>
     <SystemPrivateUriVersion>4.3.2</SystemPrivateUriVersion>
     <SystemSecurityPrincipalWindowsVersion>5.0.0</SystemSecurityPrincipalWindowsVersion>