Update .netconfig to skip incoming SL.sln

Author: kzu

.netconfig

@@ -6,6 +6,9 @@
 [file "readme.md"]
 	url = https://github.com/devlooped/oss/blob/main/readme.md
 	skip
+[file "SponsorLink.sln"]
+	url = https://github.com/devlooped/oss/blob/main/SponsorLink.sln
+	skip
 [file ".github/workflows/combine-prs.yml"]
 	url = https://github.com/devlooped/oss/blob/main/.github/workflows/combine-prs.yml
 	skip