sessions - shorter button for PR open/create (#298257)

Author: bpasero

extensions/github/package.nls.json

@@ -5,8 +5,8 @@
 	"command.publish": "Publish to GitHub",
 	"command.openOnGitHub": "Open on GitHub",
 	"command.openOnVscodeDev": "Open in vscode.dev",
-	"command.createPullRequest": "Create Pull Request",
-	"command.openPullRequest": "Open Pull Request",
+	"command.createPullRequest": "Create PR",
+	"command.openPullRequest": "Open PR",
 	"config.branchProtection": "Controls whether to query repository rules for GitHub repositories",
 	"config.gitAuthentication": "Controls whether to enable automatic GitHub authentication for git commands within VS Code.",
 	"config.gitProtocol": "Controls which protocol is used to clone a GitHub repository",