monitor-components: let's get notified about new GNU TLS versions

A common alternative to OpenSSL is GNU TLS. We already use it via GNU
Privacy Guard.

As 32-bit MSYS2 won't be updated anymore (see
https://www.msys2.org/news/#2020-05-17-32-bit-msys2-no-longer-actively-supported
for details), we have to build it ourselves.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.github/workflows/monitor-components.yml

@@ -38,6 +38,8 @@ jobs:
             feed: https://github.com/openssh/openssh-portable/tags.atom
           - label: openssl
             feed: https://github.com/openssl/openssl/tags.atom
+          - label: gnutls
+            feed: https://gnutls.org/news.atom
           - label: heimdal
             feed: https://github.com/heimdal/heimdal/tags.atom
           - label: git-sizer