maintainers: add matrix to rapiteanu (#367848)

Changed files
+1
maintainers
+1
maintainers/maintainer-list.nix
···
};
rapiteanu = {
email = "rapiteanu.catalin@gmail.com";
github = "Steinhagen";
githubId = 4029937;
name = "Viorel-Cătălin Răpițeanu";
···
};
rapiteanu = {
email = "rapiteanu.catalin@gmail.com";
+
matrix = "@catalin:one.ems.host";
github = "Steinhagen";
githubId = 4029937;
name = "Viorel-Cătălin Răpițeanu";