Simplify file names

Author: chriswblake

.github/steps/1-enable-codeql.md renamed to .github/steps/1-step.md

@@ -11,7 +11,7 @@ permissions:
   issues: write
 
 env:
-  STEP_1_FILE: ".github/steps/1-enable-codeql.md"
+  STEP_1_FILE: ".github/steps/1-step.md"
 
 jobs:
   start_exercise:

.github/steps/2-review-and-triage-codeql-alerts.md renamed to .github/steps/2-step.md

@@ -12,7 +12,7 @@ permissions:
   issues: write
 
 env:
-  STEP_2_FILE: ".github/steps/2-review-and-triage-codeql-alerts.md"
+  STEP_2_FILE: ".github/steps/2-step.md"
 
 jobs:
   find_exercise:

.github/steps/3-fix-security-vulnerabilities.md renamed to .github/steps/3-step.md

@@ -10,7 +10,7 @@ permissions:
   issues: write
 
 env:
-  STEP_3_FILE: ".github/steps/3-fix-security-vulnerabilities.md"
+  STEP_3_FILE: ".github/steps/3-step.md"
 
 jobs:
   find_exercise:

.github/steps/4-prevent-vulnerabilities-in-the-pull-request.md renamed to .github/steps/4-step.md

@@ -12,7 +12,7 @@ permissions:
   issues: write
 
 env:
-  STEP_4_FILE: ".github/steps/4-prevent-vulnerabilities-in-the-pull-request.md"
+  STEP_4_FILE: ".github/steps/4-step.md"
 
 jobs:
   find_exercise: