ci: disable setup-beam's problem matchers to quiet dep-warning annotations

setup-beam's problem matchers were promoting compiler warnings from
third-party deps (postgrex/rewrite's deprecated `xref: [exclude: ...]`,
yamerl's deprecated `catch ...` syntax) into GitHub Actions annotations
on every build. All three are already at their latest published Hex
versions, so there's no fix to bump to - just noise from code we don't
own. disable_problem_matchers: true silences the annotation promotion
while leaving the actual compiler output in the raw logs.

The remaining Node.js 20 deprecation annotation (mlugg/setup-zig@v2.2.1)
is not fixable here either - we're already on that action's latest
release, and its action.yml still declares `using: 'node20'`; that's
upstream-only until they bump it.

Closes #9.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: bougyman

.github/workflows/burrito-release.yaml

@@ -34,6 +34,12 @@ jobs:
         with:
           otp-version: "29.0.3"
           elixir-version: "1.20.3"
+          # Without this, setup-beam's problem matchers promote every
+          # compiler warning from deps (e.g. postgrex/rewrite's deprecated
+          # `xref: [exclude: ...]`, yamerl's deprecated `catch ...` syntax -
+          # both already at their latest published Hex versions, so not
+          # fixable from here) into noisy GH Actions annotations. See #9.
+          disable_problem_matchers: true
       -
         # Version pinned to what Burrito 1.6.0 actually requires - its own
         # README says 0.15.2, but the version check enforces 0.16.0. See
@@ -67,6 +73,12 @@ jobs:
         with:
           otp-version: "29.0.3"
           elixir-version: "1.20.3"
+          # Without this, setup-beam's problem matchers promote every
+          # compiler warning from deps (e.g. postgrex/rewrite's deprecated
+          # `xref: [exclude: ...]`, yamerl's deprecated `catch ...` syntax -
+          # both already at their latest published Hex versions, so not
+          # fixable from here) into noisy GH Actions annotations. See #9.
+          disable_problem_matchers: true
       -
         # Same Burrito build as the `burrito` job above, so it needs the same
         # pinned Zig (see that job's comment) - missing here would fail this

.github/workflows/ci.yaml

@@ -21,6 +21,12 @@ jobs:
         with:
           otp-version: "29.0.3"
           elixir-version: "1.20.3"
+          # Without this, setup-beam's problem matchers promote every
+          # compiler warning from deps (e.g. postgrex/rewrite's deprecated
+          # `xref: [exclude: ...]`, yamerl's deprecated `catch ...` syntax -
+          # both already at their latest published Hex versions, so not
+          # fixable from here) into noisy GH Actions annotations. See #9.
+          disable_problem_matchers: true
       -
         name: Cache deps/build
         uses: actions/cache@v6