Correct capitalization of 'atbash' to 'Atbash' (#2485)

* atbash-cipher: Correct capitalization of 'atbash' to 'Atbash' in instructions

* correct capitalization across all exercises

exercises/affine-cipher/description.md

@@ -4,7 +4,7 @@ Create an implementation of the affine cipher, an ancient encryption system crea
 
 The affine cipher is a type of monoalphabetic substitution cipher.
 Each character is mapped to its numeric equivalent, encrypted with a mathematical function and then converted to the letter relating to its new numeric value.
-Although all monoalphabetic ciphers are weak, the affine cipher is much stronger than the atbash cipher, because it has many more keys.
+Although all monoalphabetic ciphers are weak, the affine cipher is much stronger than the Atbash cipher, because it has many more keys.
 
 [//]: # " monoalphabetic as spelled by Merriam-Webster, compare to polyalphabetic "
 

exercises/atbash-cipher/canonical-data.json

@@ -2,13 +2,13 @@
   "exercise": "atbash-cipher",
   "comments": [
     "The tests are divided into two groups: ",
-    "* Encoding from English to atbash cipher",
-    "* Decoding from atbash cipher to all-lowercase-mashed-together English"
+    "* Encoding from English to Atbash cipher",
+    "* Decoding from Atbash cipher to all-lowercase-mashed-together English"
   ],
   "cases": [
     {
       "description": "encode",
-      "comments": ["Test encoding from English to atbash"],
+      "comments": ["Test encoding from English to Atbash"],
       "cases": [
         {
           "uuid": "2f47ebe1-eab9-4d6b-b3c6-627562a31c77",
@@ -86,7 +86,7 @@
     },
     {
       "description": "decode",
-      "comments": ["Test decoding from atbash to English"],
+      "comments": ["Test decoding from Atbash to English"],
       "cases": [
         {
           "uuid": "bb50e087-7fdf-48e7-9223-284fe7e69851",

exercises/atbash-cipher/description.md

@@ -1,6 +1,6 @@
 # Description
 
-Create an implementation of the atbash cipher, an ancient encryption system created in the Middle East.
+Create an implementation of the Atbash cipher, an ancient encryption system created in the Middle East.
 
 The Atbash cipher is a simple substitution cipher that relies on transposing all the letters in the alphabet such that the resulting alphabet is backwards.
 The first letter is replaced with the last letter, the second with the second-last, and so on.

exercises/atbash-cipher/metadata.toml

@@ -1,4 +1,4 @@
 title = "Atbash Cipher"
-blurb = "Create an implementation of the atbash cipher, an ancient encryption system created in the Middle East."
+blurb = "Create an implementation of the Atbash cipher, an ancient encryption system created in the Middle East."
 source = "Wikipedia"
 source_url = "https://en.wikipedia.org/wiki/Atbash"