refactor(lib): use nicer approach to escape dollar sign

Author: krzema12

github-workflows-kt/src/main/kotlin/io/github/typesafegithub/workflows/dsl/JobBuilder.kt

@@ -148,7 +148,7 @@ public class JobBuilder<OUTPUT : JobOutputs>(
                 name = name,
                 command = "GHWKT_RUN_STEP='${this.id}:$id' '$sourceFilePath'",
                 logic = logic,
-                env = env + mapOf("GHWKT_GITHUB_CONTEXT_JSON" to "${'$'}{{ toJSON(github) }}"),
+                env = env + mapOf("GHWKT_GITHUB_CONTEXT_JSON" to "\${{ toJSON(github) }}"),
                 condition =
                     conditionCheckingStep?.let {
                         expr { "steps.${conditionCheckingStep.id}.outputs.$evaluationResultOutput" }

github-workflows-kt/src/test/kotlin/io/github/typesafegithub/workflows/dsl/JobBuilderTest.kt

@@ -243,6 +243,6 @@ class JobBuilderTest :
             }
 
             // Then
-            workflow!!.jobs[0].environment?.url shouldBe "${'$'}{{ steps.deployment.outputs.page_url }}"
+            workflow!!.jobs[0].environment?.url shouldBe "\${{ steps.deployment.outputs.page_url }}"
         }
     })