fix results url construction

src/internal/shared/artifact-twirp-client.ts

@@ -52,8 +52,8 @@ class ArtifactHttpClient implements Rpc {
     contentType: 'application/json' | 'application/protobuf',
     data: object | Uint8Array
   ): Promise<object | Uint8Array> {
-    const url = `${this.baseUrl}/twirp/${service}/${method}`
-    debug(`Requesting ${url}`)
+    const url = new URL(`/twirp/${service}/${method}`, this.baseUrl).href
+    debug(`Requesting: ${url}`)
     const headers = {
       'Content-Type': contentType
     }

src/internal/shared/config.ts

@@ -19,7 +19,8 @@ export function getResultsServiceUrl(): string {
   if (!resultsUrl) {
     throw new Error('Unable to get the ACTIONS_RESULTS_URL env variable')
   }
-  return resultsUrl
+
+  return new URL(resultsUrl).origin
 }
 
 export function isGhes(): boolean {