message: ci/rust: bump MSRV to 1.63.0
  This bumps the minimum toolchain to 1.63.0, which is currently available
  on all supported Fedora versions.
diff: @@ -13,7 +13,7 @@ permissions:
  env:
  CARGO_TERM_COLOR: always
  # Minimum supported Rust version (MSRV)
  - ACTION_MSRV_TOOLCHAIN: 1.61.0
  + ACTION_MSRV_TOOLCHAIN: 1.63.0
  # Pinned toolchain for linting
  ACTION_LINTS_TOOLCHAIN: 1.64.0
  