Add inference API tag & update citation

README.md

@@ -1,5 +1,6 @@
 ---
 tags:
+- question-answering
 - roberta
 - adapterhub:qa/squad2
 - adapter-transformers
@@ -49,15 +50,18 @@ Refer to [the paper](https://arxiv.org/pdf/2104.08247) for more information on r
 If you use this adapter, please cite our paper ["What to Pre-Train on? Efficient Intermediate Task Selection"](https://arxiv.org/pdf/2104.08247):
 
 ```bibtex
-@inproceedings{poth-etal-2021-what-to-pre-train-on,
-    title={What to Pre-Train on? Efficient Intermediate Task Selection},
-    author={Clifton Poth and Jonas Pfeiffer and Andreas Rücklé and Iryna Gurevych},
-    booktitle = "Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing (EMNLP)",
+@inproceedings{poth-etal-2021-pre,
+    title = "{W}hat to Pre-Train on? {E}fficient Intermediate Task Selection",
+    author = {Poth, Clifton  and
+      Pfeiffer, Jonas  and
+      R{"u}ckl{'e}, Andreas  and
+      Gurevych, Iryna},
+    booktitle = "Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing",
     month = nov,
     year = "2021",
-    address = "Online",
+    address = "Online and Punta Cana, Dominican Republic",
     publisher = "Association for Computational Linguistics",
-    url = "https://arxiv.org/abs/2104.08247",
-    pages = "to appear",
+    url = "https://aclanthology.org/2021.emnlp-main.827",
+    pages = "10585--10605",
 }
 ```