Reduce action description in action.yml (GHA Marketplace constraint) (#294)

Co-authored-by: Paulo F. Oliveira <paulo.ferraz.oliveira@gmail.com>

.github/workflows/ubuntu.yml

@@ -73,14 +73,6 @@ jobs:
           - otp-version: '26'
             rebar3-version: 'nightly'
             os: 'ubuntu-latest'
-          - elixir-version: 'v1.4'
-            otp-version: '20'
-            rebar3-version: '3.15.0'
-            os: 'ubuntu-20.04'
-          - elixir-version: 'v1.4'
-            otp-version: '20'
-            rebar3-version: '3.11'
-            os: 'ubuntu-20.04'
           - elixir-version: 'v1.6'
             otp-version: '21'
             rebar3-version: '3.12'

README.md

@@ -74,7 +74,7 @@ and Erlang/OTP.
 | Operating system | Erlang/OTP  | Status
 |-                 |-            |-
 | `ubuntu-18.04`   | 17.0 - 25.3 | ✅
-| `ubuntu-20.04`   | 20.0 - 27   | ✅
+| `ubuntu-20.04`   | 21.0 - 27   | ✅
 | `ubuntu-22.04`   | 24.2 - 27   | ✅
 | `ubuntu-24.04`   | 24.3 - 27   | ✅
 | `windows-2019`   | 21* - 25    | ✅
@@ -165,7 +165,7 @@ jobs:
     name: OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
     strategy:
       matrix:
-        otp: ['20.3', '21.3', '22.2']
+        otp: ['21.1', '22.2', '23.3']
         elixir: ['1.8.2', '1.9.4']
     steps:
       - uses: actions/checkout@v4
@@ -189,7 +189,7 @@ jobs:
     name: Erlang/OTP ${{matrix.otp}} / rebar3 ${{matrix.rebar3}}
     strategy:
       matrix:
-        otp: ['20.3', '21.3', '22.2']
+        otp: ['21.1', '22.2', '23.3']
         rebar3: ['3.14.1', '3.14.3']
     steps:
       - uses: actions/checkout@v4

action.yml

@@ -1,9 +1,7 @@
 ---
 name: setup-beam
 description: >
-  Set up a BEAM-based CI environment, with Erlang/OTP as a base followed, optionally, by other
-  elements, like Elixir, Gleam, `rebar3` or `hex`, on top of that. Check the [README](https://github.com/erlef/setup-beam)
-  for updated information.
+  Set up a BEAM-based CI environment, supporting languages and tools such as Erlang/OTP, Elixir, Gleam, `rebar3`, and `hex`.
 author: Erlang Ecosystem Foundation
 branding:
   color: blue