Add release instructions and update release script

DEVELOPMENT.md

@@ -17,3 +17,31 @@ See JSON files in `tools/codegen/base` directory for examples of the manifest.
 3\. Add tool name to test matrix in `.github/workflows/ci.yml`.
 
 4\. Add tool name to table in "Supported tools" section in `README.md`.
+
+## Release new version
+
+Note: This is a guide for maintainers.
+
+### Minor version vs patch version
+
+Increase the patch version if only the following changes are included.
+
+- Update the `@latest` version of the tool.
+
+  Rationale: Normally, tool versions are controlled by the `@<version>` syntax, which is explicitly separated from the versioning of the install-action itself.
+
+  Exception: If the major or minor version of the `cargo-binstall` is updated, the minor version should be increased because the behavior of the fallback may change slightly.
+
+- Fix regressions or minor bugs.
+
+  Rationale: Semantic Versioning.
+
+- Improve documentation or diagnostics.
+
+  Rationale: Semantic Versioning.
+
+Increase the minor version otherwise.
+
+### Release instructions
+
+TODO: current release script assumes admin permissions