fix(YML): Removes backticks from typescript/classes/this title in es and pt translations

[mfdebian]

Los backticks en los archivos de internacionalización de objetivos de aprendizaje estaba haciendo que el parser, al generar los proyectos, arrojara el siguiente error:

YAMLException: bad indentation of a mapping entry (1225:10)

 1222 |       url: https://www.typescriptlang.o ...
 1223 | 
 1224 | typescript/classes/this:
 1225 |   title: `this`
-----------------^
 1226 |   links:
 1227 |     - title: Documentación oficial de T ...
    at generateError (file:///home/user/Documents/laboratoria/bootcamp/node_modules/js-yaml/dist/js-yaml.mjs:1273:10)
    at throwError (file:///home/user/Documents/laboratoria/bootcamp/node_modules/js-yaml/dist/js-yaml.mjs:1277:9)
    at readBlockMapping (file:///home/user/Documents/laboratoria/bootcamp/node_modules/js-yaml/dist/js-yaml.mjs:2272:7)
    at composeNode (file:///home/user/Documents/laboratoria/bootcamp/node_modules/js-yaml/dist/js-yaml.mjs:2531:12)
    at readBlockMapping (file:///home/user/Documents/laboratoria/bootcamp/node_modules/js-yaml/dist/js-yaml.mjs:2254:11)
    at composeNode (file:///home/user/Documents/laboratoria/bootcamp/node_modules/js-yaml/dist/js-yaml.mjs:2531:12)
    at readDocument (file:///home/user/Documents/laboratoria/bootcamp/node_modules/js-yaml/dist/js-yaml.mjs:2715:3)
    at loadDocuments (file:///home/user/Documents/laboratoria/bootcamp/node_modules/js-yaml/dist/js-yaml.mjs:2778:5)
    at Object.load$1 [as load] (file:///home/user/Documents/laboratoria/bootcamp/node_modules/js-yaml/dist/js-yaml.mjs:2804:19)
    at loadYaml (file:///home/user/Documents/laboratoria/bootcamp/node_modules/@laboratoria/curriculum-parser/lib/project.js:28:8) {
  reason: 'bad indentation of a mapping entry',