Correct spelling and some punctuation (#966)

Just a few tweaks to spelling and punctuation

Co-authored-by: Kruno Golubic <[email protected]>
Co-authored-by: hal-eisen-MG <[email protected]>

Author: 3 people

pages/advanced-algorithms/available-algorithms/label.mdx

@@ -11,7 +11,7 @@ import GitHub from '/components/icons/GitHub'
 # label
 
 Labels are used to categorize nodes, and the `label` module provides a function
-to check the existance of a label within the node.
+to check the existence of a label within the node.
 
 <Cards>
   <Card
@@ -47,7 +47,7 @@ Checks whether a specified node is labeled with the provided label.
 
 {<h4> Usage: </h4>}
 
-The following query, checks if the created node labeld `Student` also has a
+The following query checks if the created node labeled `Student` also has a
 `Teacher` label:
 
 ```cypher
@@ -62,4 +62,4 @@ Results:
 +----------------------------+
 | False                      |
 +----------------------------+
-```
+```