Create .git-blame-ignore-revs (dotnet#41087)

sebastienros · web-flow · commit b2679bf0bfe9 · 2022-04-07T09:52:29.000-07:00
c.f. https://docs.github.com/en/repositories/working-with-files/using-files/viewing-a-file#ignore-commits-in-the-blame-view
diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
@@ -0,0 +1,3 @@
+# .git-blame-ignore-revs
+# Use file scope namespace
+a450cb69b5e4549f5515cdb057a68771f56cefd7
