Update docs and CI

Author: ckormanyos

.github/workflows/real-time-cpp-benchmarks.yml

@@ -92,14 +92,14 @@ jobs:
           fetch-depth: '0'
       - name: update-tools
         run: |
-          wget --no-check-certificate https://github.com/ckormanyos/avr-gcc-build/releases/download/v15.1.0/gcc-15.1.0-avr.tar.gz
-          tar -xzf gcc-15.1.0-avr.tar.gz -C ${{ runner.workspace }}
+          wget --no-check-certificate https://github.com/ckormanyos/avr-gcc-build/releases/download/v15.2.0/gcc-15.2.0-avr.tar.gz
+          tar -xzf gcc-15.2.0-avr.tar.gz -C ${{ runner.workspace }}
       - name: benchmark_builds-avr
         run: |
           echo
           echo 'Add avr-g++ path'
           echo
-          PATH="${{ runner.workspace }}/gcc-15.1.0-avr/bin:$PATH"
+          PATH="${{ runner.workspace }}/gcc-15.2.0-avr/bin:$PATH"
           echo 'Query avr-g++ version'
           echo
           avr-g++ -v

examples/chapter11_07a/readme.md

@@ -71,8 +71,8 @@ The pin most important pin connections are shown in the tables below.
 
 The hardware setup with the $4~\text{MByte}$ serial SRAM
 is pictured in the image below. The scene shows the ARDUINO(R)
-with the external serial RAM executing cyclic, back-to-back $10,000$
-decimal digit $\pi$ calculations.
-One successful calculation is complete and the second one is well underway.
+with the external serial SRAM executing cyclic, back-to-back $10,001$
+decimal digit $\pi$ calculations. In this snapshot, one successful
+calculation is complete and the second one is well underway.
 
 ![](./images/board11_07a.jpg)