Fix beta npm version script

Author: ksen0

src/scripts/p5-version.ts

@@ -8,13 +8,13 @@ const clonedRepoPath = path.join(repoRootPath, "in", "p5.js");
 const outputFile = path.join(repoRootPath, "src", "globals", "p5-version.ts");
 
 const outputString = (version: string) =>
-  `export const p5Version = "${version}" as const;
+  `export const p5Version = "v${version}" as const;
 export const p5SoundVersion = "0.2.0" as const;\n`;
 
 const run = async () => {
   console.log("Reading latest p5 version to update config...");
 
-  await cloneLibraryRepo(clonedRepoPath, p5RepoUrl, "main");
+  await cloneLibraryRepo(clonedRepoPath, p5RepoUrl, "dev-2.0");
 
   // read version from package.json
   const packageConfigContents = await readFile(