Correct anchor links to Environment variables (#5680)

Author: MikeMcC399

docs/guides/references/configuration.mdx

@@ -436,9 +436,9 @@ highlighted to show where the value has been set via the following ways:
 - Default value
 - [Cypress configuration file](/guides/references/configuration)
 - The
-  [Cypress environment file](/guides/guides/environment-variables#Option-2-cypress-env-json)
+  [Cypress environment file](/guides/guides/environment-variables#Option-2-cypressenvjson)
 - System
-  [environment variables](/guides/guides/environment-variables#Option-3-CYPRESS)
+  [environment variables](/guides/guides/environment-variables#Option-3-CYPRESS_)
 - [Command Line arguments](/guides/guides/command-line)
 - [setupNodeEvents](#setupNodeEvents)
 

docs/guides/references/configuration_legacy.mdx

@@ -452,9 +452,9 @@ value has been set via the following ways:
 - Default value
 - The [configuration file](/guides/references/configuration)
 - The
-  [Cypress environment file](/guides/guides/environment-variables#Option-2-cypress-env-json)
+  [Cypress environment file](/guides/guides/environment-variables#Option-2-cypressenvjson)
 - System
-  [environment variables](/guides/guides/environment-variables#Option-3-CYPRESS)
+  [environment variables](/guides/guides/environment-variables#Option-3-CYPRESS_)
 - [Command Line arguments](/guides/guides/command-line)
 - [Plugins file](/api/plugins/configuration-api)
 

docs/guides/tooling/plugins-guide.mdx

@@ -33,7 +33,7 @@ You can [check out the API docs here](/api/plugins/writing-a-plugin).
 With plugins, you can programmatically alter the resolved configuration and
 environment variables that come from the
 [Cypress configuration file](/guides/references/configuration),
-[`cypress.env.json`](/guides/guides/environment-variables#Option-2-cypress-env-json),
+[`cypress.env.json`](/guides/guides/environment-variables#Option-2-cypressenvjson),
 the [command line](/guides/guides/command-line), or system environment
 variables.