Update README.md

README.md

@@ -23,7 +23,7 @@ AX.25 encoder is also quite simple. It can handle multiple frames in a row (limi
 ### Modulator (and NRZI encoder)
 The NRZI encoder runs at exactly 1200Hz (=1200 Baud) and requests bits from the AX.25 encoder. Bits are encoded to symbols and the DAC sampling timer interval is set depending on symbol value. Because of that there is only one sine table used. For 1200Hz tone the timer interval is larger than for 2200 Hz tone - the sampling frequency is changed to change the output signal frequency. An array index is always kept so that the output signal phase is continuous.
 ## Using VP-Digi code in your project
-I would love to hear about projects which implement VP-Digi source code. If you are making one, let me know at sq8vps<at>gmail.com.
+I would love to hear about projects which implement VP-Digi source code. If you are making one, let me know at sq8vps(at)gmail.com.
 ## References
 The project took a lot of time, but now it's probably the most effective, publicly available, STM32-based modem and the most customizable microcontroller-based APRS digipeater. I would like to mention some resources I found really useful or inspiring:
 * [multimon-ng](https://github.com/EliasOenal/multimon-ng) - general demodulator idea (correlation)
@@ -36,4 +36,4 @@ The project took a lot of time, but now it's probably the most effective, public
 All contributions are appreciated, but please keep the code reasonably clean. Also, please make sure that the firmware is working well before creating a pull request.
 
 ## License
-The project is licensed under the GNU GPL v3 license (see [LICENSE](LICENSE)).
+The project is licensed under the GNU GPL v3 license (see [LICENSE](LICENSE)).