Well-known-struct-tags: add properties tag

The 'properties' package is imported by over 1,000 packages and provides
functionality for mapping property files to Go structs.

Fixes golang/go#72759

Change-Id: If38c46b9382e408c88d895d16f9e65999333c84e
GitHub-Last-Rev: 65cc062
GitHub-Pull-Request: #44
Reviewed-on: https://go-review.googlesource.com/c/wiki/+/656535
Reviewed-by: Ian Lance Taylor <[email protected]>

Author: Sourabh-Kumar7

Well-known-struct-tags.md

@@ -44,6 +44,7 @@ graphql      | https://github.com/samsarahq/thunder
 json         | https://pkg.go.dev/encoding/json
 mapstructure | https://pkg.go.dev/github.com/mitchellh/mapstructure
 parser       | https://pkg.go.dev/github.com/alecthomas/participle
+properties   | https://pkg.go.dev/github.com/magiconair/properties#Properties.Decode
 protobuf     | https://github.com/golang/protobuf
 reform       | https://pkg.go.dev/gopkg.in/reform.v1
 spanner      | https://pkg.go.dev/cloud.google.com/go/spanner