fix: follow-redirects Component Governance vulnerability

[BruceHaley]

Fixes #minor

Description

Fixes the high severity follow-redirects vulnerability listed in these 2 CG alerts:
https://fuselabs.visualstudio.com/SDK_v4/_componentGovernance/112352/alert/6373557?typeId=10422422
https://fuselabs.visualstudio.com/SDK_v4/_componentGovernance/112352/alert/6373574?typeId=10422422

Vulnerability: follow-redirects 1.5.10
-- Recommendation: Upgrade follow-redirects from 1.5.10 to 1.14.7
Vulnerability: follow-redirects 1.14.4
-- Recommendation: Upgrade follow-redirects from 1.14.4 to 1.14.7

The initial follow-redirects dependency tree looked like this:

C:\src\botbuilder-js>npm ls follow-redirects
botbuilder-js@4.13.0 C:\src\botbuilder-js
`-- @azure/ms-rest-js@1.9.1
  `-- axios@0.21.4
    `-- follow-redirects@1.14.4

I fixed it with the command:
yarn upgrade @azure/ms-rest-js@2.6.0
...resulting in the dependency being eliminated:

C:\src\botbuilder-js>npm ls follow-redirects
botbuilder-js@4.13.0 C:\src\botbuilder-js
`-- (empty)

Testing

I tested the fix in these 4 Sample-Js E2E test runs:
Sample-Js-CoreBot-Linux-Test-yaml
Sample-Js-CoreBot-Win-Test-yaml
Sample-Js-EchoBot-Linux-Test-yaml
Sample-Js-EchoBot-Win-Test-yaml

[coveralls]

Pull Request Test Coverage Report for Build 1775283574

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.003%) to 84.546%

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Totals
Change from base Build 1775183583:	-0.003%
Covered Lines:	19668
Relevant Lines:	22036

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💛 - Coveralls