Update RELEASE-NOTES.md

Merge bitnami-labs#415

415: Fix travis Go version r=mkmik a=mkmik

Turns out all our released binaries are compiled with Go 1.14.0 because .travis.yaml
contains the `1.14` version spec which doesn't imply "latest version of 1.14 branch"

(I checked that on our released binaries following the instructions on https://dave.cheney.net/2017/06/20/how-to-find-out-which-go-version-built-your-binary)

A user reported an issue (bitnami-labs#411) that is likely caused by a toolchain bug (golang/go#37436)
which is fixed in 1.14.1 (2020/03/19).

Several sealed-secret releases happened after that and we didn't inherit the fix.

Given the strong backwards compat guarantees the Go team commits to,
I think it's a good idea to just build with the latest version of the toolchain.

Closes bitnami-labs#411

Co-authored-by: Marko Mikulicic <mkmik@vmware.com>

Merge bitnami-labs#408

408: Workaround WriteFile on windows r=mkmik a=mkmik

Closes bitnami-labs#407

Co-authored-by: Marko Mikulicic <mkmik@vmware.com>

Merge pull request bitnami-labs#404 from bitnami-labs/unbreak

Revert "Add recommended labels"

Update RELEASE-NOTES.md

Merge branch 'release-notes'

Update RELEASE-NOTES.md

Update RELEASE-NOTES.md

Fix before_deploy

Fix after_success