minor host fix found while compiling arduinoJson (#8009)

Author: d-a-v

tests/host/sys/pgmspace.h

@@ -30,7 +30,7 @@
     #define pgm_read_byte(addr)             (*reinterpret_cast<const uint8_t*>(addr))
     #define pgm_read_word(addr)             (*reinterpret_cast<const uint16_t*>(addr))
     #define pgm_read_dword(addr)            (*reinterpret_cast<const uint32_t*>(addr))
-    #define pgm_read_float(addr)            (*reinterpret_cast<const float>(addr))
+    #define pgm_read_float(addr)            (*reinterpret_cast<const float*>(addr))
     #define pgm_read_ptr(addr)              (*reinterpret_cast<const void* const *>(addr))
 #else
     #define pgm_read_byte(addr)             (*(const uint8_t*)(addr))