Fix CHANGELOG v3.1.0 community contributor misattributions

Three entries in the v3.1.0 section credited only the maintainer but should
also acknowledge the community contributors whose prior work informed the
fixes. Add samuel-phan, vahid-haghighat, and davidmh credits alongside the
existing maintainer credit, matching the dual-credit format already used
elsewhere in the CHANGELOG.

Author: Zordrak

CHANGELOG.md

@@ -11,12 +11,12 @@
  * NEW FEATURE: Add `TFENV_SKIP_REMOTE_CHECK` to skip checking remote versions before installing (David Forster <david.forster@capgemini.com>)
  * NEW FEATURE: Add per-version file locking to prevent concurrent install races, fixing #422 (Mike Peachey <mike.peachey@bjss.com>)
  * NEW FEATURE: Load bashlog conditionally based on shell interactivity via `TFENV_BASHLOG`, fixing #229 (Mike Peachey <mike.peachey@bjss.com>)
- * NEW FEATURE: Improve custom remote compatibility for Artifactory and similar mirrors (Mike Peachey <mike.peachey@bjss.com>)
+ * NEW FEATURE: Improve custom remote compatibility for Artifactory and similar mirrors (samuel-phan, Mike Peachey <mike.peachey@bjss.com>)
  * NEW FEATURE: Add Dockerfile for containerised usage and end-to-end testing (Mike Peachey <mike.peachey@bjss.com>)
- * FIX: Filter pre-release versions from `latest` resolution; use `latest:` (with colon) or alphabetic regex to include pre-releases, fixing #375 and #204 (Mike Peachey <mike.peachey@bjss.com>)
+ * FIX: Filter pre-release versions from `latest` resolution; use `latest:` (with colon) or alphabetic regex to include pre-releases, fixing #375 and #204 (vahid-haghighat, Mike Peachey <mike.peachey@bjss.com>)
  * FIX: CLI argument takes precedence over `TFENV_TERRAFORM_VERSION` for install, fixing #441 (Mike Peachey <mike.peachey@bjss.com>)
  * FIX: Route tfenv log output to stderr in terraform shim context, fixing #374 (Mike Peachey <mike.peachey@bjss.com>)
- * FIX: Do not assume brew is available for GNU grep detection, fixing #442 (Mike Peachey <mike.peachey@bjss.com>)
+ * FIX: Do not assume brew is available for GNU grep detection, fixing #442 (davidmh, Mike Peachey <mike.peachey@bjss.com>)
  * FIX: Operator precedence bug and unbound variable in version-name resolution, fixing #406 and #431 (Mike Peachey <mike.peachey@bjss.com>)
  * FIX: Double-quoted trap in tfenv-install vulnerable to word-splitting, fixing #455 (Mike Peachey <mike.peachey@bjss.com>)
  * FIX: Unquoted curl options in curlw() causing failures with paths containing spaces, fixing #454 (Mike Peachey <mike.peachey@bjss.com>)