Fix YAML failure

Author: walbourn

build/DirectXTex-GitHub-WSL-11.yml

@@ -35,12 +35,12 @@ resources:
     name: Microsoft/DirectX-Headers
     type: github
     endpoint: microsoft
-    ref: refs/tags/main
+    ref: refs/heads/main
   - repository: dxMathRepo
     name: Microsoft/DirectXMath
     type: github
     endpoint: microsoft
-    ref: refs/tags/main
+    ref: refs/heads/main
   - repository: vcpkgRepo
     name: Microsoft/vcpkg
     type: github

build/DirectXTex-GitHub-WSL.yml

@@ -55,12 +55,12 @@ resources:
     name: Microsoft/DirectX-Headers
     type: github
     endpoint: microsoft
-    ref: refs/tags/main
+    ref: refs/heads/main
   - repository: dxMathRepo
     name: Microsoft/DirectXMath
     type: github
     endpoint: microsoft
-    ref: refs/tags/main
+    ref: refs/heads/main
   - repository: vcpkgRepo
     name: Microsoft/vcpkg
     type: github