Update graddle/wrapper-validation-action version from v3 to v4.

[joewyz]

Background

Recent PR experienced connection errors like the following:

Error: Multiple errors returned
Error: Error 0: connect ETIMEDOUT 104.16.72.101:443
Error: connect ETIMEDOUT 104.16.72.101:443
    at createConnectionError (node:net:1652:[14](https://github.com/smithy-lang/smithy/actions/runs/15330227683/job/43134921095?pr=2647#step:3:16))
    at Timeout.internalConnectMultipleTimeout (node:net:1711:38)
    at listOnTimeout (node:internal/timers:583:11)
    at process.processTimers (node:internal/timers:519:7)
Error: Error 1: connect ENETUNREACH 2606:4700::6810:4965:443 - Local (:::0)
Error: connect ENETUNREACH 2606:4700::6810:4965:443 - Local (:::0)
    at internalConnectMultiple (node:net:1186:[16](https://github.com/smithy-lang/smithy/actions/runs/15330227683/job/43134921095?pr=2647#step:3:18))
    at Timeout.internalConnectMultipleTimeout (node:net:[17](https://github.com/smithy-lang/smithy/actions/runs/15330227683/job/43134921095?pr=2647#step:3:19)16:5)
    at listOnTimeout (node:internal/timers:583:11)
    at process.processTimers (node:internal/timers:519:7)
Error: Error 2: connect ETIMEDOUT 104.16.73.101:443
Error: connect ETIMEDOUT 104.16.73.101:443
    at createConnectionError (node:net:1652:14)
    at Timeout.internalConnectMultipleTimeout (node:net:1711:38)
    at listOnTimeout (node:internal/timers:583:11)
    at process.processTimers (node:internal/timers:519:7)
Error: Error 3: connect ENETUNREACH 2606:4700::6810:4865:443 - Local (:::0)
Error: connect ENETUNREACH 2606:4700::6810:4865:443 - Local (:::0)
    at internalConnectMultiple (node:net:1[18](https://github.com/smithy-lang/smithy/actions/runs/15330227683/job/43134921095?pr=2647#step:3:20)6:16)
    at Timeout.internalConnectMultipleTimeout (node:net:1716:5)
    at listOnTimeout (node:internal/timers:583:11)
    at process.processTimers (node:internal/timers:5[19](https://github.com/smithy-lang/smithy/actions/runs/15330227683/job/43134921095?pr=2647#step:3:21):7)

Found this error was caused by the validation-action version from one similar GitHub issue.
I followed the official gradle Github Workflow and updated the gradle/wrapper-validation-action@v3 to gradle/actions/wrapper-vadlidation@v4 to avoid errors in future PRs.

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.