docs(misra c compliance matrix): 📝 Add rule 1.1 with appropriate emot…

…icons

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docs/misra_c_compliance_matrix.md

@@ -16,6 +16,7 @@ The following table is the MISRA C compliance matrix for CRSF for Arduino.
 
 | MISRA Rule | Rule flag | GCC Arm None EABI | Cppcheck | Manual review |
 | --- | --- | --- | --- | --- |
+| Rule 1.1 | Required | :x: | :x: | :white_check_mark: |
 | Rule 1.3 | Required | | | |
 | Rule 2.1 | Required | | | |
 | Rule 2.2 | Required | | | |