Build docs on OTP 27 too

Author: onno-vos-dev

.github/workflows/build.yml

@@ -64,7 +64,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest]
-        otp-version: [24, 25, 26]
+        otp-version: [24, 25, 26, 27]
     runs-on: ${{ matrix.platform }}
     container:
       image: erlang:${{ matrix.otp-version }}
@@ -86,4 +86,4 @@ jobs:
         restore-keys: |
           ${{ runner.os }}-dialyzer-
     - name: Generate docs
-      run: rebar3 ex_doc
+      run: rebar3 ex_doc