Fix wrong name of a terraform example application

[nghialv]

What this PR does / why we need it:

This wrong name causes a broken link in the README.md of examples repository.

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

NONE

[khanhtc1202]

Nice catch ⚾
/approve

[khanhtc1202]

/approve cancel

[khanhtc1202]

please update links to example applications on the docs too 👀
https://github.com/pipe-cd/pipe/blame/master/docs/content/en/docs/examples/_index.md#L47

[nghialv]

Nice catch!
Thank you. Fixed!

[khanhtc1202]

Thx 🚀
/approve

[pipecd-bot]

This pull request is APPROVED by khanhtc1202.

Approvers can cancel the approval by writing /approve cancel in a comment. Any additional commits also will change this pull request to be not-approved.

[pipecd-bot]

Code coverage for golang is 32.56%. This pull request increases coverage by 0.14%.

File	Function	Base	Head	Diff
pkg/app/piped/apistore/commandstore/store.go	store.ListBuildPlanPreviewCommands	--	0.00%	+0.00%
pkg/app/piped/cloudprovider/terraform/terraform.go	GetExitCode	--	0.00%	+0.00%
pkg/app/piped/planpreview/builder.go	newBuilder	--	0.00%	+0.00%
pkg/app/piped/planpreview/builder.go	builder.Build	--	0.00%	+0.00%
pkg/app/piped/planpreview/builder.go	builder.listApplications	--	0.00%	+0.00%
pkg/app/piped/planpreview/handler.go	WithWorkerNum	--	100.00%	+100.00%
pkg/app/piped/planpreview/handler.go	WithCommandQueueBufferSize	--	0.00%	+0.00%
pkg/app/piped/planpreview/handler.go	WithCommandCheckInterval	--	100.00%	+100.00%
pkg/app/piped/planpreview/handler.go	WithCommandHandleTimeout	--	0.00%	+0.00%
pkg/app/piped/planpreview/handler.go	WithLogger	--	0.00%	+0.00%
pkg/app/piped/planpreview/handler.go	NewHandler	--	85.71%	+85.71%
pkg/app/piped/planpreview/handler.go	Handler.Run	--	94.44%	+94.44%
pkg/app/piped/planpreview/handler.go	Handler.enqueueNewCommands	--	93.75%	+93.75%
pkg/app/piped/planpreview/handler.go	Handler.handleCommand	--	43.48%	+43.48%
pkg/app/piped/apistore/commandstore/store.go	store.sync	0.00%	0.00%	+0.00%
pkg/app/piped/cloudprovider/terraform/terraform.go	Terraform.Init	0.00%	0.00%	+0.00%
pkg/app/piped/cloudprovider/terraform/terraform.go	Terraform.Plan	0.00%	0.00%	+0.00%
pkg/app/piped/cloudprovider/terraform/terraform.go	Terraform.Apply	0.00%	0.00%	+0.00%