fix: broken link to examples folder in README.md

[rakshitgondwal]

Fixes #670

Updated the link to the examples folder in README.md at line 100 to ./examples/sample-app/

[thisthat]

Hey @rakshitgondwal, thank you for your contribution :)
Could you please sign your commit? You can do that using this command: git rebase HEAD~1 --signoff

[codecov]

Codecov Report

Merging #671 (d22dd11) into main (a3b0f7b) will decrease coverage by 0.80%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #671      +/-   ##
==========================================
- Coverage   56.36%   55.56%   -0.80%     
==========================================
  Files          82       74       -8     
  Lines        6683     6239     -444     
==========================================
- Hits         3767     3467     -300     
+ Misses       2756     2650     -106     
+ Partials      160      122      -38     

Impacted Files	Coverage Δ
klt-cert-manager/kubeutils/query.go
klt-cert-manager/kubeutils/certificates.go
...llers/keptnwebhookcontroller/certificate_secret.go
klt-cert-manager/eventfilter/eventfilter.go
...okcontroller/keptnwebhookcertificate_controller.go
...rs/keptnwebhookcontroller/webhook_configuration.go
klt-cert-manager/kubeutils/secret.go
...anager/controllers/keptnwebhookcontroller/certs.go

Flag	Coverage Δ
component-tests	52.84% <ø> (ø)
keptn-cert-manager	?
scheduler	21.17% <ø> (ø)

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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