wasm: Fix typo found in documentation (#33874)

Signed-off-by: Jon Friesen <jon@jonfriesen.ca>

Mirrored from https://github.com/envoyproxy/envoy @ 29d30aa2ea190d67c04cdc26f23c5c9954460ab4

envoy/extensions/wasm/v3/wasm.proto

@@ -96,9 +96,10 @@ message VmConfig {
   bool nack_on_code_cache_miss = 6;
 
   // Specifies environment variables to be injected to this VM which will be available through
-  // WASI's ``environ_get`` and ``environ_get_sizes`` system calls. Note that these functions are mostly implicitly
-  // called in your language's standard library, so you do not need to call them directly and you can access to env
-  // vars just like when you do on native platforms.
+  // WASI's ``environ_get`` and ``environ_get_sizes`` system calls. Note that these functions
+  // are generally called implicitly by your language's standard library. Therefore, you do not
+  // need to call them directly. You can access environment variables in the same way you would
+  // on native platforms.
   // Warning: Envoy rejects the configuration if there's conflict of key space.
   EnvironmentVariables environment_variables = 7;
 }