Docs: Typo Fix (pytorch#6526)

Corrected "initalization" to "initialization" in [README.md].

This pull request addresses a minor typo found in repository. The typo has been corrected to improve clarity and maintain the quality of the documentation.

This change is purely cosmetic and does not affect functionality.

README.md

@@ -92,7 +92,7 @@ tools.
 ├── runtime                         #  Core C++ runtime.
 |   ├── backend                     #  Backend delegate runtime APIs.
 |   ├── core                        #  Core structures used across all levels of the runtime.
-|   ├── executor                    #  Model loading, initalization, and execution.
+|   ├── executor                    #  Model loading, initialization, and execution.
 |   ├── kernel                      #  Kernel registration and management.
 |   ├── platform                    #  Layer between architecture specific code and portable C++.
 ├── schema                          #  ExecuTorch PTE file format flatbuffer