bip376: add README reference in BIPs table

Author: nymius

README.mediawiki

@@ -1262,6 +1262,13 @@ users (see also: [https://en.bitcoin.it/wiki/Economic_majority economic majority
 | Specification
 | Draft
 |-
+| [[bip-0376.mediawiki|376]]
+| Applications
+| Spending Silent Payment outputs with PSBTs
+| nymius
+| Specification
+| Draft
+|-
 | [[bip-0379.md|379]]
 | Applications
 | Miniscript