Update CONTRIBUTING.md

Co-authored-by: Thijs Schreijer <[email protected]>

CONTRIBUTING.md

@@ -47,7 +47,7 @@ before making more changes - that way we can take in each change separately.
   - update `./lua/pl/utils.lua` (the `_VERSION` constant)
   - update `./config.ld` with the new version number
   - copy dev rockspec file to release filename in in `./rockspecs` and match version in rockspec
-  - edit rockspec, drop `description.issue_url`, `test_dependencies`, and `test` keys, reduce `rockspec_format` to "1.0"
+  - [until we hit 2.0.0] edit rockspec, drop `description.issue_url`, `test_dependencies`, `test`, and `rockspec_format` keys
   - check the `./CHANGELOG.md` files for completeness
   - commit the release related changes
   - render the documentation using `ldoc .`
@@ -58,4 +58,3 @@ before making more changes - that way we can take in each change separately.
   - upload the rockspec, and source rock files to LuaRocks
   - test installing through LuaRocks
   - announce the release on the Lua mailing list
-