Document 1.1.1 release

Author: sm18lr88

.github/release-notes/v1.1.1.md

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+# VS Code Check 1.1.1
+
+This patch release updates the extension icon artwork.
+
+Highlights:
+
+- Replaces the checkmark inside the code brackets with a question mark.
+- Changes the underline accent from a straight line to a squiggly diagnostic-style underline.
+- Keeps local screenshot files out of packaged VSIX artifacts.
+
+Install the attached `.vsix` file in VS Code with **Extensions: Install from VSIX...**.