fix: Debian unstable release should use mongod binaries for version 92

Related #85

Author: nodkz

src/util/MongoBinaryDownloadUrl.js

@@ -117,7 +117,7 @@ export default class MongoBinaryDownloadUrl {
   getDebianVersionString(os: getos.Os): string {
     let name: string = 'debian';
     const release: number = parseFloat(os.release);
-    if (release >= 9) {
+    if (release >= 9 || os.release === 'unstable') {
       name += '92';
     } else if (release >= 8.1) {
       name += '81';