fix(amazonq): increase polling frequency for bearer token. (aws#7123)

## Problem
During the bug bash, someone encountered the LSP attempting to use an
expired bearer token. I am unable to reproduce the issue, but can
speculate at the cause.

We refresh the bearer token on the LSP every 1 minute, but if the token
expires, and then a request is made before the next refresh it can fail.

Note: this is a temporary solution until we have LSP auth. 

## Solution
- double the frequency with which we check the token. 
- We still only send the token if it changed, meaning this won't cause
noisy request to LSP.


---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Author: Hweinstock

packages/amazonq/src/lsp/auth.ts

@@ -86,7 +86,7 @@ export class AmazonQLspAuth {
         this.client.info(`UpdateBearerToken: ${JSON.stringify(request)}`)
     }
 
-    public startTokenRefreshInterval(pollingTime: number = oneMinute) {
+    public startTokenRefreshInterval(pollingTime: number = oneMinute / 2) {
         const interval = setInterval(async () => {
             await this.refreshConnection().catch((e) => {
                 getLogger('amazonqLsp').error('Unable to update bearer token: %s', (e as Error).message)