fix: libgit2sharp pdb file no longer bundled with exe

Applies to Windows only. No `PackageReference` explicitly changed since
it's already using wildcard version. So the next release will naturally
have the fix. But it's worth pointing out in the changelog.

CHANGELOG.md

@@ -8,6 +8,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### FIXED
+
+- libgit2sharp PDB is no longer required with trash.exe on Windows.
+
 ## [1.6.3] - 2021-07-31
 
 ### FIXED