Upgrade the handlebars version to 4.7.7

[sandushi]

Purpose

• Upgrade the handlebars version to 4.7.7

[wso2-jenkins-bot]

🦋 Changeset detected

The changes in this PR will be included in the next version bump.

Not sure what this means? Click here to learn what changesets are.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 31.79%. Comparing base (6d42e3a) to head (ebf9245). Report is 195 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #6943 +/- ## ======================================= Coverage 31.79% 31.79% ======================================= Files 41 41 Lines 890 890 Branches 220 206 -14 ======================================= Hits 283 283 - Misses 587 607 +20 + Partials 20 0 -20 ``` | [Flag](https://app.codecov.io/gh/wso2/identity-apps/pull/6943/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wso2) | Coverage Δ | | |---|---|---| | [@wso2is/core](https://app.codecov.io/gh/wso2/identity-apps/pull/6943/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wso2) | `31.79% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wso2#carryforward-flags-in-the-pull-request-comment) to find out more. [see 6 files with indirect coverage changes](https://app.codecov.io/gh/wso2/identity-apps/pull/6943/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=wso2)