fixing some format with the formulas

Signed-off-by: Juan Bustamante <jbustamante@vmware.com>

text/0000-multiarch-builders-and-package.md

@@ -723,7 +723,14 @@ With our previous example, it means
 
 $$ ShareLayers(A) = \{\text{LICENSE},\text{NOTICE},\text{README.md},\text{buildpack.toml},\text{resources/config.properties}\} $$
 
-$$ PlatformLayers(A,text\{linux,amd64\}) = \{\text{bin/build},\text{bin/detect},\text{bin/foo}\} $$
+$$ PlatformLayers(A,\text{linux,amd64}) = \{\text{bin/build},\text{bin/detect},\text{bin/foo}\} $$
+
+$$ PlatformLayers(A,\text{linux,arm64}) = \{\text{bin/build},\text{bin/detect},\text{bin/bar}\} $$
+
+$$ BuildpackPackageLayers(A,\text{linux,amd64}) = \{\text{LICENSE},\text{NOTICE},\text{README.md},\text{buildpack.toml},\text{resources/config.properties}\} + \{\text{bin/build},\text{bin/detect},\text{bin/foo}\} $$
+
+$$ BuildpackPackageLayers(A,\text{linux,arm64}) = \{\text{LICENSE},\text{NOTICE},\text{README.md},\text{buildpack.toml},\text{resources/config.properties}\} + \{\text{bin/build},\text{bin/detect},\text{bin/bar}\} $$
+
 
 This means the shared layer can be reused in each intermediate image and improve the performance when it contains big files