Fix typos

modules/3-ssdlc.livemd

@@ -142,7 +142,7 @@ An example of developing a web application using defense in depth could be:
 * The codebase is checked automatically for vulnerabilities using Semgrep
 * The codebase is also checked for outdated dependencies using Dependabot
 * The application is regularly tested by the internal security team
-* Multiple development environments are used such as Develpoment, Staging, and Production
+* Multiple development environments are used such as Development, Staging, and Production
 
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modules/5-elixir.livemd

@@ -128,7 +128,7 @@ Plainly speaking, response time it takes to compute a given function measured at
 
 This technique is primarily used to analyze string comparisons of secret values to brute-force the identify of the secret.
 
-e.g. When comparing two strings, the function exits when variation is detected. Take a secret value `MY_SECRET` and a user input `MY_PASSWORD`, the string compariosn (`MY_PASSWORD == MY_SECRET`) would go character by character until there's a complete match or a discrepancy. So if the new input was `MY_SAUCE`, that new string would take marginally longer to compare against the secret than `MY_PASSWORD` because of one more similar character as `MY_SECRET`.
+e.g. When comparing two strings, the function exits when variation is detected. Take a secret value `MY_SECRET` and a user input `MY_PASSWORD`, the string comparison (`MY_PASSWORD == MY_SECRET`) would go character by character until there's a complete match or a discrepancy. So if the new input was `MY_SAUCE`, that new string would take marginally longer to compare against the secret than `MY_PASSWORD` because of one more similar character as `MY_SECRET`.
 
 ### Prevention