fix list of authors

Author: valaafoninateacher2025

doc/tutorial/6_reactor.ipynb

@@ -8,6 +8,7 @@
     "\n",
     "- (c) 2019, 2020 Dr. Ramil Nugmanov;\n",
     "- (c) 2019 Dr. Timur Madzhidov; Ravil Mukhametgaleev\n",
+    "- (c) 2020-2022 Adelia Fatykhova\n",
     "- (c) 2022 Valentina Afonina\n",
     "\n",
     "Installation instructions of CGRtools package information and tutorial's files see on `https://github.com/cimm-kzn/CGRtools`\n",