securitycenter: fix yaml (#24619)

* `securitycenter` fix yaml

* fix path in readme.md

Author: ziyeqf

specification/security/resource-manager/readme.md

@@ -907,7 +907,8 @@ These settings apply only when `--tag=package-2023-05` is specified on the comma
 
 ```yaml $(tag) == 'package-2023-05'
 input-file:
-  - Microsoft.Security/stable/2023-05-01/serverVulnerabilityAssessmentsSettings.json
+  - Microsoft.Security/stable/2023-05-01/ServerVulnerabilityAssessmentsSettings.json
+```
 
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