Update examples/proxy-validation-test/README.md

Co-authored-by: Matthew M. Keeler <[email protected]>

Author: kinyoklion

examples/proxy-validation-test/README.md

@@ -16,7 +16,7 @@ This test validates that the LaunchDarkly C++ Client SDK properly uses CURL for
 
 Polling can be validated by changing the hello-cpp-client application to use polling.
 
-## Test Architecturegit
+## Test Architecture
 
 The test uses Docker Compose with network isolation to validate proxy functionality: