Update nnpdf_data/nnpdf_data/commondata/CMS_2JET_8TEV/metadata.yaml

Crazy I missed it....

Co-authored-by: Amedeo Chiefa <103528316+achiefa@users.noreply.github.com>

Author: andrpie

nnpdf_data/nnpdf_data/commondata/CMS_2JET_8TEV/metadata.yaml

@@ -30,7 +30,7 @@ implemented_observables:
       yb: {description: "the boost of the two leading jets", label: "$y_\text{b}$", units: ""}
       ystar: {description: "half rapidity separation of the two leading jets", label: "$y^*$", units: ""}
       pTavg: {description: "average transverse momentum of the two leading jets", label: '\(p_{\text{T,avg}}\)', units: "GeV"}
-  kinematic_coverage: [yb, star pTavg]
+  kinematic_coverage: [yb, star, pTavg]
   # Data
   data_central: data.yaml
   data_uncertainties: