deps: update mu_msvm to v26.0.44 release (#5033)

Changelog:
[microsoft/mu_msvm@v26.0.43...v26.0.44](microsoft/mu_msvm@v26.0.43...v26.0.44)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: maheeraeron

flowey/flowey_lib_hvlite/src/_jobs/cfg_versions.rs

@@ -26,7 +26,7 @@ pub const GH_CLI: &str = "2.52.0";
 pub const MDBOOK: &str = "0.4.40";
 pub const MDBOOK_ADMONISH: &str = "1.18.0";
 pub const MDBOOK_MERMAID: &str = "0.14.0";
-pub const MU_MSVM: &str = "26.0.43";
+pub const MU_MSVM: &str = "26.0.44";
 pub const NEXTEST: &str = "0.9.133";
 pub const NODEJS: &str = "24.x";
 // None disables hcl-dev builds and tests; Some(version) enables them.

nix/uefi_mu_msvm.nix

@@ -8,13 +8,13 @@ let
          else if system == "aarch64-linux" then "AARCH64-CLANGPDB"
          else "X64-CLANGPDB";
   hash = {
-    "AARCH64-CLANGPDB" = "sha256-S85FiDQU0bM+JeKnvjSSJhSZxWdIgKR59e5t7LDzzXw=";
-    "X64-CLANGPDB" = "sha256-bya+gVGPIfi6uEUdXfDqG+nNFU7JjOHymDrbWIyeo9Y=";
+    "AARCH64-CLANGPDB" = "sha256-dkRfShH2GW3k3tH8CBnYYpIq/Wi5B8cg2yp3F2wLhwM=";
+    "X64-CLANGPDB" = "sha256-Ww1plif/mcGnC91Mk4WkkCYN3fEyYi35ocvxzcWMMoM=";
   }.${archToolchain};
 
 in stdenv.mkDerivation rec {
   pname = "uefi-mu-msvm-${archToolchain}";
-  version = "26.0.43";
+  version = "26.0.44";
 
   src = fetchzip {
     url =