docs(quick-deploy): fix step numbering - rename 'Step 9 Post-Install Validation' to 'Step 10' after adding SELinux troubleshooting as Step 9

Author: ShawnMcKee

docs/personas/quick-deploy/install-perfsonar-toolkit.md

@@ -1432,7 +1432,7 @@ ausearch -m AVC | awk -F'avc:' '{print $2}' | sort | uniq -c | sort -rn | head -
 
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-## Step 9 – Post-Install Validation
+## Step 10 – Post-Install Validation
 
 Perform these checks before handing the host over to operations: