Update README.md

Author: nspyrop03

README.md

@@ -101,7 +101,7 @@ Each compiler stage lives in its own subdirectory with a dedicated README:
 
 Additional documentation:
 
-* [LLVM IR Optimization](OPTIMIZATIONS.md) – explains our optimization pipeline, levels, and LLVM passes used.
+* [LLVM IR Optimization](OPTIMISATIONS.md) – explains our optimization pipeline, levels, and LLVM passes used.
 * [Projects](PROJECTS.md) – analysis of large/complex Dana programs in `testing/extra-hard/`.
 
 ---
@@ -168,4 +168,4 @@ chmod +x llvm.sh
 This downloads and configures LLVM 14.
 If needed, adjust priorities to ensure `llvm-config` points to the correct version.
 
----
+---