fix(actions): keep github.event.inputs as strings for workflow_dispatch (#38899)

`github.event.inputs` must mirror the raw `workflow_dispatch` payload,
where
GitHub keeps every input as a string. Only the separate `inputs` context
preserves declared types, e.g. booleans. A previous fix coerced boolean
inputs in the single map that fed both contexts, so
`github.event.inputs.someBool` became a real boolean and comparisons
like
`== 'true'` stopped matching.

`github.event.inputs` now stays string-only again. The `inputs` context
used
for server-side `if:` evaluation of needs-gated/matrix-deferred jobs
re-coerces booleans independently, from the job's own workflow
declaration,
so that path keeps working correctly.

Fixes https://github.com/go-gitea/gitea/issues/38896

---------

Co-authored-by: Zettat123 <zettat123@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>

services/actions/workflow_test.go

@@ -17,6 +17,8 @@ func TestCoerceDispatchInputTypes(t *testing.T) {
 			"build_server": {Type: "boolean"},
 			"dry_run":      {Type: "boolean"},
 			"already_bool": {Type: "boolean"},
+			"yaml_true":    {Type: "boolean"},
+			"yaml_truthy":  {Type: "boolean"},
 			"version":      {Type: "string"},
 		},
 	}
@@ -27,6 +29,9 @@ func TestCoerceDispatchInputTypes(t *testing.T) {
 		"dry_run":      "false",
 		// already-native booleans are passed through unchanged (coercion is idempotent)
 		"already_bool": true,
+		// source text of `default: True` and `default: yes`, only the former is a YAML 1.2 boolean
+		"yaml_true":   "True",
+		"yaml_truthy": "yes",
 		// non-boolean inputs must be left untouched
 		"version": "1.2.3",
 	}
@@ -38,5 +43,17 @@ func TestCoerceDispatchInputTypes(t *testing.T) {
 	assert.Equal(t, true, inputs["build_server"])
 	assert.Equal(t, false, inputs["dry_run"])
 	assert.Equal(t, true, inputs["already_bool"])
+	assert.Equal(t, true, inputs["yaml_true"])
+	assert.Equal(t, false, inputs["yaml_truthy"])
 	assert.Equal(t, "1.2.3", inputs["version"])
+
+	// `github.event.inputs` mirrors them as normalized strings
+	assert.Equal(t, map[string]any{
+		"build_server": "true",
+		"dry_run":      "false",
+		"already_bool": "true",
+		"yaml_true":    "true",
+		"yaml_truthy":  "false",
+		"version":      "1.2.3",
+	}, dispatchEventInputs(inputs))
 }