Bump nbgv from 3.8.118 to 3.9.50 (#26)

---
updated-dependencies:
- dependency-name: nbgv
  dependency-version: 3.9.50
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.config/dotnet-tools.json

@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "nbgv": {
-      "version": "3.8.118",
+      "version": "3.9.50",
       "commands": [
         "nbgv"
       ],