Minor typo fixes in README.md (#31167)

README.md

@@ -210,18 +210,18 @@ The Matter repository is structured as follows:
 | credentials | Development and test credentials |
 | docs | Documentation, including guides. Visit the [Matter SDK documentation page](https://project-chip.github.io/connectedhomeip-doc/index.html) to read it. |
 | examples | Example firmware applications that demonstrate use of Matter |
-| integrations | 3rd Party integrations |
+| integrations | 3rd party integrations |
 | scripts | Scripts needed to work with the Matter repository |
 | src | Implementation of Matter |
 | third_party | 3rd party code used by Matter |
-| zzz_generated | zap generated template code - Revolving around cluster information |
-| BUILD.gn | Build file for the gn build system |
+| zzz_generated | ZAP generated template code - Revolving around cluster information |
+| BUILD.gn | Build file for the GN build system |
 | CODE_OF_CONDUCT.md | Code of conduct for Matter and contribution to it |
 | CONTRIBUTING.md | Guidelines for contributing to Matter |
 | LICENSE | Matter license file |
 | REVIEWERS.md | PR reviewers |
 | gn_build.sh | Build script for specific projects such as Android, EFR32, etc. |
-| README.md | This File |
+| README.md | This file |
 
 # License