Update es.yml

Revert the Spanish version of line 1707-1715

Author: Gracia-zhang

src/data/es.yml

@@ -1704,14 +1704,14 @@ teach:
   teach-filter2-label7: 'Virtual-Online '
   teach-filter3: 'Year : '
   teach-filter4: 'Level of Difficulty : '
-  teach-filter4-label1: Elementary
-  teach-filter4-label2: Intermediate
-  teach-filter4-label3: Advanced
-  teach-case-subtitle1: Venue & Date
-  teach-case-subtitle2: Participants
-  teach-case-subtitle3: Level of Difficulty
-  teach-case-subtitle4: Goals
-  teach-case-subtitle5: Method & Materials
+  teach-filter4-label1: Primaria
+  teach-filter4-label2: Intermedio
+  teach-filter4-label3: Advanzado
+  teach-case-subtitle1: Lugar y fecha
+  teach-case-subtitle2: Participantes
+  teach-case-subtitle3: Nivel de Dificultad
+  teach-case-subtitle4: Metas
+  teach-case-subtitle5: Método y Materiales
   teach-case1-title: p5.js at Ubuntu Party!
   teach-case1-lead-name: Basile Pesin
   teach-case1-content1: '2020 Ubuntu Party, '
@@ -1960,4 +1960,4 @@ teach:
     dice, playing cards and various paper tools to help students learn about
     coding concepts.
   teach-case12-content5-1: Syllabus & Material
-  teach-case12-content5-2: More photos
+  teach-case12-content5-2: More photos