Update README.template.md

Author: ocots

README.template.md

@@ -48,7 +48,7 @@ If you use OptimalControl.jl in your work, please cite us:
 or in BibTeX format:
 
 ```bibtex
-@software{OptimalControl_jl_a_Julia,
+@software{OptimalControl_jl,
 author = {Caillau, Jean-Baptiste and Cots, Olivier and Gergaud, Joseph and Martinon, Pierre and Sed, Sophia},
 doi = {10.5281/zenodo.16753152},
 license = {["MIT"]},