Fix VSCode tasks (#347)

## Type of change
```
- [x] Bug fix
- [ ] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other
```

## Objective
Fix invalid path in VSCode tasks

.vscode/tasks.json

@@ -6,7 +6,7 @@
       "command": "build",
       "problemMatcher": ["$rustc"],
       "options": {
-        "cwd": "${workspaceFolder}/bitwarden-c/"
+        "cwd": "${workspaceFolder}/crates/bitwarden-c/"
       },
       "group": {
         "kind": "build",
@@ -19,7 +19,7 @@
       "command": "build",
       "args": ["--release"],
       "options": {
-        "cwd": "${workspaceFolder}/bitwarden-c/"
+        "cwd": "${workspaceFolder}/crates/bitwarden-c/"
       },
       "problemMatcher": ["$rustc"],
       "label": "rust: bitwarden-c release build"