GH-36599: [MATLAB] Bump libmexclass version to 3465900 (#36600)

### Rationale for this change

We recently made some improvements to `libmexclass` that include creating a class named `libmexclass.proxy.Identifier` which represents proxy ids. This class will be helpful when we create `arrowy.array.Array` objects from existing proxy ids, which used to be represented as scalar `uint64` values.

### What changes are included in this PR?

1. Bumps the libmexclass version the MATLAB Interface depends on to [#3465900](mathworks/libmexclass@3465900) 

### Are these changes tested?

No tests needed.

### Are there any user-facing changes?

No.

* Closes: #36599

Authored-by: Sarah Gilmore <sgilmore@mathworks.com>
Signed-off-by: Kevin Gurney <kgurney@mathworks.com>

matlab/tools/cmake/BuildMatlabArrowInterface.cmake

@@ -24,7 +24,7 @@ set(MATLAB_ARROW_LIBMEXCLASS_CLIENT_FETCH_CONTENT_NAME libmexclass)
 # libmexclass is accessible for CI without permission issues.
 set(MATLAB_ARROW_LIBMEXCLASS_CLIENT_FETCH_CONTENT_GIT_REPOSITORY "https://github.com/mathworks/libmexclass.git")
 # Use a specific Git commit hash to avoid libmexclass version changing unexpectedly.
-set(MATLAB_ARROW_LIBMEXCLASS_CLIENT_FETCH_CONTENT_GIT_TAG "77f3d72")
+set(MATLAB_ARROW_LIBMEXCLASS_CLIENT_FETCH_CONTENT_GIT_TAG "3465900")
 
 set(MATLAB_ARROW_LIBMEXCLASS_CLIENT_FETCH_CONTENT_SOURCE_SUBDIR "libmexclass/cpp")